{"title":"Residential Boilers","description":"","products":[{"product_id":"noble®-combi-gas-boiler-wall-mount","title":"Lochinvar NKC199N Noble Combi Boiler | 199,000 BTU High Efficiency","description":"\u003cp\u003eThe Lochinvar NKC199N Noble Combi Boiler delivers high-efficiency hydronic heating and domestic hot water performance in a compact wall-mounted design. Featuring a stainless steel fire tube heat exchanger, 95% AFUE efficiency rating, and 10:1 turndown ratio, the NKC199N is engineered for reliable residential radiant floor heating, baseboard heating, and domestic hot water applications.\u003c\/p\u003e\n\u003cp\u003eDesigned for modern hydronic systems, this condensing natural gas combi boiler provides up to 199,000 BTU input while maintaining energy-efficient operation and consistent hot water delivery. The built-in SMART CONTROL™ system offers advanced performance monitoring, easy setup, and user-friendly operation.\u003c\/p\u003e\n\u003cp\u003eIdeal for radiant floor heating systems, hydronic manifolds, and multi-zone heating applications, the Lochinvar Noble Series combines space-saving installation with powerful heating capacity.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e199,000 BTU high-efficiency combi boiler\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e95% AFUE ENERGY STAR® certified\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStainless steel fire tube heat exchanger\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWall-mounted space-saving design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDomestic hot water and space heating in one unit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e10:1 turndown ratio for improved efficiency\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNatural gas configuration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdvanced SMART CONTROL™ operating system\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQuiet operation with condensing technology\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with radiant floor heating and hydronic systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eRadiant floor heating\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHydronic heating systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBaseboard heating\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eResidential space heating\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDomestic hot water production\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMulti-zone heating systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eModel: NKC199N\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFuel Type: Natural Gas\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBoiler Type: Condensing Combi Boiler\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAFUE Rating: 95%\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMounting Type: Wall Hung\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHeat Exchanger: Stainless Steel Fire Tube\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInput Capacity: 199,000 BTU\/hr\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVenting: PVC, CPVC, Polypropylene, Stainless Steel Compatible\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWarming Systems\u003c\/strong\u003e provides trusted hydronic heating solutions, technical support, and professional-grade radiant heating products for residential and commercial installations.\u003c\/p\u003e","brand":"Lochinvar","offers":[{"title":"Default Title","offer_id":53454189527224,"sku":null,"price":3670.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0914\/2376\/8760\/files\/NOBLE_CombiGasBoilerWallMount.png?v=1778515878"},{"product_id":"lochinvar-ng-nkb199n-noble-fire-tube-boiler-199-000-btu-high-efficiency","title":"Lochinvar (NG) NKB199N Noble Fire Tube Boiler | 199,000 BTU High Efficiency","description":"\u003cstyle\u003e\n .ws-nkb199 {\n max-width: 1100px;\n margin: 0 auto;\n color: #242424;\n font-family: inherit;\n line-height: 1.65;\n }\n\n .ws-nkb199 * {\n box-sizing: border-box;\n }\n\n .ws-nkb199 h2,\n .ws-nkb199 h3 {\n color: #222222;\n line-height: 1.25;\n margin-top: 0;\n }\n\n .ws-nkb199 h2 {\n margin-bottom: 16px;\n font-size: 30px;\n }\n\n .ws-nkb199 h3 {\n margin-bottom: 15px;\n font-size: 23px;\n }\n\n .ws-nkb199 p {\n margin: 0 0 17px;\n }\n\n .ws-nkb199-section {\n margin: 38px 0;\n }\n\n .ws-nkb199-highlights {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 14px;\n margin: 26px 0 32px;\n }\n\n .ws-nkb199-highlight {\n padding: 20px 15px;\n border: 1px solid #e2e2e2;\n border-radius: 12px;\n background: #f8f8f8;\n text-align: center;\n }\n\n .ws-nkb199-highlight strong {\n display: block;\n margin-bottom: 5px;\n color: #9e0929;\n font-size: 25px;\n line-height: 1.2;\n }\n\n .ws-nkb199-notice {\n margin: 28px 0;\n padding: 20px 22px;\n border-left: 5px solid #9e0929;\n border-radius: 8px;\n background: #f8eeee;\n }\n\n .ws-nkb199-notice strong {\n color: #850720;\n }\n\n .ws-nkb199-features {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 12px 28px;\n margin: 0;\n padding: 0;\n list-style: none;\n }\n\n .ws-nkb199-features li {\n position: relative;\n padding: 2px 0 2px 34px;\n }\n\n .ws-nkb199-features li::before {\n content: \"✓\";\n position: absolute;\n top: 0;\n left: 0;\n width: 23px;\n height: 23px;\n border-radius: 50%;\n background: #9e0929;\n color: #ffffff;\n font-size: 14px;\n font-weight: 700;\n line-height: 23px;\n text-align: center;\n }\n\n .ws-nkb199-applications {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 16px;\n }\n\n .ws-nkb199-application {\n padding: 22px;\n border: 1px solid #e1e1e1;\n border-radius: 12px;\n background: #ffffff;\n }\n\n .ws-nkb199-application strong {\n display: block;\n margin-bottom: 6px;\n color: #9e0929;\n font-size: 18px;\n }\n\n .ws-nkb199-radiant {\n padding: 28px;\n border-radius: 14px;\n background: #f5f5f5;\n }\n\n .ws-nkb199-spec-grid {\n display: grid;\n grid-template-columns: repeat(2, minmax(0, 1fr));\n gap: 20px;\n align-items: start;\n }\n\n .ws-nkb199-specs {\n width: 100%;\n border: 1px solid #dddddd;\n border-collapse: collapse;\n }\n\n .ws-nkb199-specs th,\n .ws-nkb199-specs td {\n padding: 13px 15px;\n border-bottom: 1px solid #dddddd;\n text-align: left;\n vertical-align: top;\n }\n\n .ws-nkb199-specs th {\n width: 43%;\n background: #f5f5f5;\n font-weight: 700;\n }\n\n .ws-nkb199-specs tr:last-child th,\n .ws-nkb199-specs tr:last-child td {\n border-bottom: 0;\n }\n\n .ws-nkb199-callout {\n margin-top: 30px;\n padding: 22px;\n border: 1px solid #e2c26a;\n border-radius: 10px;\n background: #fff9e8;\n }\n\n .ws-nkb199-disclaimer {\n margin-top: 25px;\n padding-top: 20px;\n border-top: 1px solid #dddddd;\n color: #555555;\n font-size: 14px;\n }\n\n @media screen and (max-width: 749px) {\n .ws-nkb199 h2 {\n font-size: 25px;\n }\n\n .ws-nkb199-highlights,\n .ws-nkb199-features,\n .ws-nkb199-applications,\n .ws-nkb199-spec-grid {\n grid-template-columns: 1fr;\n }\n\n .ws-nkb199-specs th,\n .ws-nkb199-specs td {\n display: block;\n width: 100%;\n }\n\n .ws-nkb199-specs th {\n padding-bottom: 5px;\n border-bottom: 0;\n }\n\n .ws-nkb199-specs td {\n padding-top: 5px;\n }\n }\n\u003c\/style\u003e\n\n\u003cdiv class=\"ws-nkb199\"\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch2\u003eLochinvar Noble NKB199N High-Efficiency Fire Tube Boiler\u003c\/h2\u003e\n\n \u003cp\u003e\n The Lochinvar Noble NKB199N is a high-efficiency, wall-mounted\n condensing boiler designed to provide dependable heat for demanding\n residential hydronic systems. With a maximum input of 199,000 BTU and\n 95% AFUE efficiency, it delivers powerful heating performance while\n helping reduce natural gas consumption.\n \u003c\/p\u003e\n\n \u003cp\u003e\n Its stainless steel fire-tube heat exchanger provides efficient heat\n transfer, low pressure drop and long-term corrosion resistance. The\n compact wall-mounted configuration also helps preserve valuable floor\n space in mechanical rooms, basements and utility areas.\n \u003c\/p\u003e\n\n \u003cdiv class=\"ws-nkb199-highlights\"\u003e\n \u003cdiv class=\"ws-nkb199-highlight\"\u003e\n \u003cstrong\u003e199,000\u003c\/strong\u003e\n Maximum BTU Input\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-highlight\"\u003e\n \u003cstrong\u003e95%\u003c\/strong\u003e\n AFUE Efficiency\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-highlight\"\u003e\n \u003cstrong\u003e10:1\u003c\/strong\u003e\n Turndown Ratio\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-notice\"\u003e\n \u003cstrong\u003eHeating-only boiler:\u003c\/strong\u003e\n The NKB199N heats water for a hydronic space-heating system. It does\n not produce domestic hot water directly like the Lochinvar NKC199N\n combi boiler. The NKB199N may be incorporated into a properly designed\n system with a compatible indirect water heater when domestic hot-water\n production is needed.\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch3\u003eKey Features\u003c\/h3\u003e\n\n \u003cul class=\"ws-nkb199-features\"\u003e\n \u003cli\u003e199,000 BTU maximum input for larger residential heating loads\u003c\/li\u003e\n \u003cli\u003e19,900 BTU minimum input for efficient low-load operation\u003c\/li\u003e\n \u003cli\u003e95% AFUE high-efficiency condensing performance\u003c\/li\u003e\n \u003cli\u003e10:1 modulation turndown ratio for improved comfort\u003c\/li\u003e\n \u003cli\u003eDurable ASME stainless steel fire-tube heat exchanger\u003c\/li\u003e\n \u003cli\u003eLow pressure-drop design provides greater piping flexibility\u003c\/li\u003e\n \u003cli\u003eSMART CONTROL™ digital operating control\u003c\/li\u003e\n \u003cli\u003eOutdoor-reset control capability\u003c\/li\u003e\n \u003cli\u003eBuilt-in cascading control for systems with multiple boilers\u003c\/li\u003e\n \u003cli\u003eUniversal connector supports several approved vent materials\u003c\/li\u003e\n \u003cli\u003eCompact wall-mounted configuration saves floor space\u003c\/li\u003e\n \u003cli\u003eENERGY STAR® certified residential boiler\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\n \u003cdiv class=\"ws-nkb199-applications\"\u003e\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eRadiant Floor Heating\u003c\/strong\u003e\n Provides controlled hot-water temperatures for comfortable and\n efficient in-floor radiant heating systems.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eMulti-Zone Hydronic Systems\u003c\/strong\u003e\n Suitable for homes with several independently controlled heating\n zones and varying heating demands.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eBaseboard and Radiator Heating\u003c\/strong\u003e\n Can supply properly designed hydronic baseboard, panel radiator and\n traditional radiator systems.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eHydro-Air Systems\u003c\/strong\u003e\n Can serve as the heat source for compatible air handlers equipped\n with hydronic heating coils.\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section ws-nkb199-radiant\"\u003e\n \u003ch3\u003eDesigned for Radiant Floor Heating\u003c\/h3\u003e\n\n \u003cp\u003e\n The Noble NKB199N is well suited for larger hydronic radiant-floor\n heating installations. Its modulating burner adjusts boiler output as\n heating demand changes, helping maintain more consistent system-water\n temperatures and reducing unnecessary cycling.\n \u003c\/p\u003e\n\n \u003cp\u003e\n When paired with properly sized manifolds, pumps, mixing controls and\n zoning components, the NKB199N can provide heat for multiple rooms,\n floors or heating zones from one central boiler.\n \u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\n \u003cdiv class=\"ws-nkb199-spec-grid\"\u003e\n\n \u003ctable class=\"ws-nkb199-specs\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eManufacturer\u003c\/th\u003e\n \u003ctd\u003eLochinvar\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eModel\u003c\/th\u003e\n \u003ctd\u003eNKB199N\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eProduct Type\u003c\/th\u003e\n \u003ctd\u003eWall-mounted condensing fire-tube boiler\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n \u003ctd\u003eHydronic space heating\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eFuel Type\u003c\/th\u003e\n \u003ctd\u003eNatural gas\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eMaximum Input\u003c\/th\u003e\n \u003ctd\u003e199,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eMinimum Input\u003c\/th\u003e\n \u003ctd\u003e19,900 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eDOE Heating Capacity\u003c\/th\u003e\n \u003ctd\u003e185,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eNet AHRI Rating\u003c\/th\u003e\n \u003ctd\u003e161,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eEfficiency\u003c\/th\u003e\n \u003ctd\u003e95% AFUE\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eTurndown Ratio\u003c\/th\u003e\n \u003ctd\u003e10:1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eWater Connections\u003c\/th\u003e\n \u003ctd\u003e1 inch\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n\n \u003ctable class=\"ws-nkb199-specs\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eGas Connection\u003c\/th\u003e\n \u003ctd\u003e1\/2 inch\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eVent Options\u003c\/th\u003e\n \u003ctd\u003e\n 2-inch venting up to 50 equivalent feet or 3-inch venting up to\n 100 equivalent feet, subject to installation requirements\n \u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eApproved Vent Materials\u003c\/th\u003e\n \u003ctd\u003ePVC, CPVC, polypropylene or approved stainless steel\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eElectrical Supply\u003c\/th\u003e\n \u003ctd\u003e120 VAC, 60 Hz, single phase\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eApproximate Dimensions\u003c\/th\u003e\n \u003ctd\u003e33\" H × 17-1\/16\" W × 18\" D\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eShipping Weight\u003c\/th\u003e\n \u003ctd\u003eApproximately 140 lb.\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eHeat Exchanger Warranty\u003c\/th\u003e\n \u003ctd\u003e10-year limited warranty\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eParts Warranty\u003c\/th\u003e\n \u003ctd\u003e5-year limited warranty\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-callout\"\u003e\n \u003cstrong\u003eAltitude and system-sizing assistance:\u003c\/strong\u003e\n For installations above 4,500 feet, or for assistance determining whether\n this boiler is properly sized for your heating system, please call\n \u003cstrong\u003e1-800-663-7831\u003c\/strong\u003e before ordering.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-disclaimer\"\u003e\n Boiler selection should be based on a professional heat-loss calculation,\n not square footage alone. Installation, venting, gas connections, system\n piping, startup and combustion testing must be completed by a qualified\n heating professional in accordance with Lochinvar instructions and all\n applicable codes. Warranty coverage is subject to the manufacturer’s\n current terms and conditions.\n \u003c\/div\u003e\n\n\u003c\/div\u003e\n","brand":"Lochinvar","offers":[{"title":"Default Title","offer_id":53801090318520,"sku":null,"price":3300.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0914\/2376\/8760\/files\/NKB199N_Transparent.png?v=1784827998"},{"product_id":"lochinvar-ng-nkc150n-noble-fire-tube-boiler-150-000-btu-high-efficiency","title":"Lochinvar (NG) NKC150N Noble Fire Tube Boiler | 150,000 BTU High Efficiency","description":"\u003cstyle\u003e\n .ws-nkc150 {\n max-width: 1100px;\n margin: 0 auto;\n color: #242424;\n font-family: inherit;\n line-height: 1.65;\n }\n\n .ws-nkc150 * {\n box-sizing: border-box;\n }\n\n .ws-nkc150 h2,\n .ws-nkc150 h3 {\n margin-top: 0;\n color: #222222;\n line-height: 1.25;\n }\n\n .ws-nkc150 h2 {\n margin-bottom: 16px;\n font-size: 30px;\n }\n\n .ws-nkc150 h3 {\n margin-bottom: 15px;\n font-size: 23px;\n }\n\n .ws-nkc150 p {\n margin: 0 0 17px;\n }\n\n .ws-nkc150-section {\n margin: 38px 0;\n }\n\n .ws-nkc150-highlights {\n display: grid;\n grid-template-columns: repeat(3, minmax(0, 1fr));\n gap: 14px;\n margin: 26px 0 32px;\n }\n\n .ws-nkc150-highlight {\n padding: 20px 15px;\n border: 1px solid #e2e2e2;\n border-radius: 12px;\n background: #f8f8f8;\n text-align: center;\n }\n\n .ws-nkc150-highlight strong {\n display: block;\n margin-bottom: 5px;\n color: #9e0929;\n font-size: 25px;\n line-height: 1.2;\n }\n\n .ws-nkc150-notice {\n margin: 28px 0;\n padding: 20px 22px;\n border-left: 5px solid #9e0929;\n border-radius: 8px;\n background: #f8eeee;\n }\n\n .ws-nkc150-notice strong {\n color: #850720;\n }\n\n .ws-nkc150-features {\n display: grid;\n grid-template-columns: repeat(2, minmax(0, 1fr));\n gap: 12px 28px;\n margin: 0;\n padding: 0;\n list-style: none;\n }\n\n .ws-nkc150-features li {\n position: relative;\n padding: 2px 0 2px 34px;\n }\n\n .ws-nkc150-features li::before {\n content: \"✓\";\n position: absolute;\n top: 0;\n left: 0;\n width: 23px;\n height: 23px;\n border-radius: 50%;\n background: #9e0929;\n color: #ffffff;\n font-size: 14px;\n font-weight: 700;\n line-height: 23px;\n text-align: center;\n }\n\n .ws-nkc150-applications {\n display: grid;\n grid-template-columns: repeat(2, minmax(0, 1fr));\n gap: 16px;\n }\n\n .ws-nkc150-application {\n padding: 22px;\n border: 1px solid #e1e1e1;\n border-radius: 12px;\n background: #ffffff;\n }\n\n .ws-nkc150-application strong {\n display: block;\n margin-bottom: 6px;\n color: #9e0929;\n font-size: 18px;\n }\n\n .ws-nkc150-combi {\n padding: 28px;\n border-radius: 14px;\n background: #f5f5f5;\n }\n\n .ws-nkc150-combi-grid {\n display: grid;\n grid-template-columns: repeat(2, minmax(0, 1fr));\n gap: 22px;\n margin-top: 20px;\n }\n\n .ws-nkc150-combi-item {\n padding: 20px;\n border: 1px solid #dddddd;\n border-radius: 10px;\n background: #ffffff;\n }\n\n .ws-nkc150-combi-item strong {\n display: block;\n margin-bottom: 6px;\n color: #9e0929;\n font-size: 18px;\n }\n\n .ws-nkc150-spec-grid {\n display: grid;\n grid-template-columns: repeat(2, minmax(0, 1fr));\n gap: 20px;\n align-items: start;\n }\n\n .ws-nkc150-specs {\n width: 100%;\n border: 1px solid #dddddd;\n border-collapse: collapse;\n }\n\n .ws-nkc150-specs th,\n .ws-nkc150-specs td {\n padding: 13px 15px;\n border-bottom: 1px solid #dddddd;\n text-align: left;\n vertical-align: top;\n }\n\n .ws-nkc150-specs th {\n width: 43%;\n background: #f5f5f5;\n font-weight: 700;\n }\n\n .ws-nkc150-specs tr:last-child th,\n .ws-nkc150-specs tr:last-child td {\n border-bottom: 0;\n }\n\n .ws-nkc150-callout {\n margin-top: 30px;\n padding: 22px;\n border: 1px solid #e2c26a;\n border-radius: 10px;\n background: #fff9e8;\n }\n\n .ws-nkc150-disclaimer {\n margin-top: 25px;\n padding-top: 20px;\n border-top: 1px solid #dddddd;\n color: #555555;\n font-size: 14px;\n }\n\n @media screen and (max-width: 749px) {\n .ws-nkc150 h2 {\n font-size: 25px;\n }\n\n .ws-nkc150-highlights,\n .ws-nkc150-features,\n .ws-nkc150-applications,\n .ws-nkc150-combi-grid,\n .ws-nkc150-spec-grid {\n grid-template-columns: 1fr;\n }\n\n .ws-nkc150-combi {\n padding: 22px;\n }\n\n .ws-nkc150-specs th,\n .ws-nkc150-specs td {\n display: block;\n width: 100%;\n }\n\n .ws-nkc150-specs th {\n padding-bottom: 5px;\n border-bottom: 0;\n }\n\n .ws-nkc150-specs td {\n padding-top: 5px;\n }\n }\n\u003c\/style\u003e\n\n\u003cdiv class=\"ws-nkc150\"\u003e\n\n \u003cdiv class=\"ws-nkc150-section\"\u003e\n \u003ch2\u003eLochinvar Noble NKC150N High-Efficiency Combi Boiler\u003c\/h2\u003e\n\n \u003cp\u003e\n The Lochinvar Noble NKC150N is a high-efficiency, wall-mounted\n condensing combi boiler that provides hydronic space heating and\n domestic hot water from one compact appliance. With a maximum input\n of 150,000 BTU and 95% AFUE efficiency, it provides dependable comfort\n while helping reduce natural gas consumption.\n \u003c\/p\u003e\n\n \u003cp\u003e\n The NKC150N combines an ASME stainless steel fire-tube heat exchanger\n for space heating with a stainless steel brazed-plate heat exchanger\n for domestic hot-water production. Its compact wall-mounted design\n reduces the amount of mechanical-room equipment needed while preserving\n valuable floor space.\n \u003c\/p\u003e\n\n \u003cdiv class=\"ws-nkc150-highlights\"\u003e\n \u003cdiv class=\"ws-nkc150-highlight\"\u003e\n \u003cstrong\u003e150,000\u003c\/strong\u003e\n Maximum BTU Input\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkc150-highlight\"\u003e\n \u003cstrong\u003e95%\u003c\/strong\u003e\n AFUE Efficiency\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkc150-highlight\"\u003e\n \u003cstrong\u003e3.6 GPM\u003c\/strong\u003e\n Domestic Hot Water\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkc150-notice\"\u003e\n \u003cstrong\u003eAll-in-one combi boiler:\u003c\/strong\u003e\n The NKC150N provides both hydronic space heating and on-demand domestic\n hot water. Its 3.6 GPM domestic hot-water rating is based on a 77°F\n temperature rise. Actual hot-water delivery will vary depending on\n incoming water temperature, set point and simultaneous fixture demand.\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkc150-section\"\u003e\n \u003ch3\u003eKey Features\u003c\/h3\u003e\n\n \u003cul class=\"ws-nkc150-features\"\u003e\n \u003cli\u003e150,000 BTU maximum input for residential heating applications\u003c\/li\u003e\n \u003cli\u003e15,000 BTU minimum input for efficient low-load operation\u003c\/li\u003e\n \u003cli\u003e95% AFUE high-efficiency condensing performance\u003c\/li\u003e\n \u003cli\u003e10:1 modulation turndown ratio for improved comfort\u003c\/li\u003e\n \u003cli\u003eProvides space heating and domestic hot water from one appliance\u003c\/li\u003e\n \u003cli\u003eUp to 3.6 GPM domestic hot water at a 77°F temperature rise\u003c\/li\u003e\n \u003cli\u003eASME stainless steel fire-tube heat exchanger\u003c\/li\u003e\n \u003cli\u003eStainless steel brazed-plate domestic water heat exchanger\u003c\/li\u003e\n \u003cli\u003eSMART CONTROL™ digital operating system\u003c\/li\u003e\n \u003cli\u003ePlain-language LCD display and guided setup controls\u003c\/li\u003e\n \u003cli\u003eOutdoor-reset control capability\u003c\/li\u003e\n \u003cli\u003eDomestic hot-water preheat and response settings\u003c\/li\u003e\n \u003cli\u003eAir-handler interlock for compatible hydro-air systems\u003c\/li\u003e\n \u003cli\u003eBuilt-in circulating pump\u003c\/li\u003e\n \u003cli\u003eUniversal vent connection for multiple vent materials\u003c\/li\u003e\n \u003cli\u003eENERGY STAR® certified residential boiler\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkc150-section\"\u003e\n \u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\n \u003cdiv class=\"ws-nkc150-applications\"\u003e\n \u003cdiv class=\"ws-nkc150-application\"\u003e\n \u003cstrong\u003eRadiant Floor Heating\u003c\/strong\u003e\n Provides controlled hot-water temperatures for comfortable and\n efficient in-floor radiant heating systems.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkc150-application\"\u003e\n \u003cstrong\u003eDomestic Hot Water\u003c\/strong\u003e\n Produces on-demand hot water for showers, sinks and other residential\n plumbing fixtures without a separate tank-style water heater.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkc150-application\"\u003e\n \u003cstrong\u003eBaseboard and Radiator Heating\u003c\/strong\u003e\n Can supply properly designed hydronic baseboard, panel-radiator and\n traditional radiator systems.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkc150-application\"\u003e\n \u003cstrong\u003eHydro-Air Systems\u003c\/strong\u003e\n Can serve compatible air handlers while its interlock helps prevent\n cool-air circulation during domestic hot-water production.\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkc150-section ws-nkc150-combi\"\u003e\n \u003ch3\u003eHeating and Hot Water From One Appliance\u003c\/h3\u003e\n\n \u003cp\u003e\n The Noble NKC150N is designed for homes that need efficient hydronic\n heating and reliable on-demand domestic hot water without installing\n two separate appliances.\n \u003c\/p\u003e\n\n \u003cdiv class=\"ws-nkc150-combi-grid\"\u003e\n \u003cdiv class=\"ws-nkc150-combi-item\"\u003e\n \u003cstrong\u003eConsistent Space Heating\u003c\/strong\u003e\n The modulating burner adjusts its output as heating demand changes,\n helping maintain comfortable system-water temperatures while reducing\n unnecessary on-and-off cycling.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkc150-combi-item\"\u003e\n \u003cstrong\u003eResponsive Hot Water\u003c\/strong\u003e\n Advanced domestic hot-water controls provide quick response when a\n faucet or shower is opened and are designed to reduce interruptions\n in hot-water delivery.\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkc150-section\"\u003e\n \u003ch3\u003eDesigned for Radiant Floor Heating\u003c\/h3\u003e\n\n \u003cp\u003e\n The NKC150N is well suited for hydronic radiant-floor heating systems.\n Its condensing operation, outdoor-reset capability and 10:1 turndown\n ratio allow the boiler to adjust as outdoor temperatures and heating\n loads change.\n \u003c\/p\u003e\n\n \u003cp\u003e\n When paired with properly sized manifolds, pumps, controls and zoning\n components, the NKC150N can supply multiple rooms or heating zones while\n also producing domestic hot water from the same wall-mounted appliance.\n \u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkc150-section\"\u003e\n \u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\n \u003cdiv class=\"ws-nkc150-spec-grid\"\u003e\n\n \u003ctable class=\"ws-nkc150-specs\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eManufacturer\u003c\/th\u003e\n \u003ctd\u003eLochinvar\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eModel\u003c\/th\u003e\n \u003ctd\u003eNKC150N\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eProduct Type\u003c\/th\u003e\n \u003ctd\u003eWall-mounted condensing combi boiler\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eFuel Type\u003c\/th\u003e\n \u003ctd\u003eNatural gas\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eMaximum Input\u003c\/th\u003e\n \u003ctd\u003e150,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eMinimum Input\u003c\/th\u003e\n \u003ctd\u003e15,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eDOE Heating Capacity\u003c\/th\u003e\n \u003ctd\u003e139,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eNet AHRI Rating\u003c\/th\u003e\n \u003ctd\u003e121,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eEfficiency\u003c\/th\u003e\n \u003ctd\u003e95% AFUE\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eTurndown Ratio\u003c\/th\u003e\n \u003ctd\u003e10:1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eDomestic Hot Water\u003c\/th\u003e\n \u003ctd\u003eUp to 3.6 GPM at a 77°F temperature rise\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n\n \u003ctable class=\"ws-nkc150-specs\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eSpace-Heating Connections\u003c\/th\u003e\n \u003ctd\u003e1 inch\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eDomestic Water Connections\u003c\/th\u003e\n \u003ctd\u003e3\/4 inch\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eGas Connection\u003c\/th\u003e\n \u003ctd\u003e1\/2 inch\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eVenting Options\u003c\/th\u003e\n \u003ctd\u003e\n 2-inch venting up to 50 equivalent feet or 3-inch venting up\n to 100 equivalent feet\n \u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eApproved Vent Materials\u003c\/th\u003e\n \u003ctd\u003e\n PVC, CPVC, polypropylene or approved stainless steel\n \u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eElectrical Supply\u003c\/th\u003e\n \u003ctd\u003e120 VAC, 60 Hz, single phase\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n \u003ctd\u003e32-1\/2\" H × 18-3\/4\" W × 18\" D\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eShipping Weight\u003c\/th\u003e\n \u003ctd\u003eApproximately 142 lb.\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eHeat Exchanger Warranty\u003c\/th\u003e\n \u003ctd\u003e10-year limited warranty\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eParts Warranty\u003c\/th\u003e\n \u003ctd\u003e5-year limited warranty\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eInstallation\u003c\/th\u003e\n \u003ctd\u003eIndoor installation only\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkc150-callout\"\u003e\n \u003cstrong\u003eAltitude and system-sizing assistance:\u003c\/strong\u003e\n This model is rated for installation at altitudes up to 4,500 feet.\n For high-altitude applications or assistance determining whether this\n boiler can meet your heating and domestic hot-water requirements, please\n call \u003cstrong\u003e1-800-663-7831\u003c\/strong\u003e before ordering.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkc150-disclaimer\"\u003e\n Boiler selection should be based on a professional heat-loss calculation\n and domestic hot-water demand analysis, not square footage alone.\n Installation, venting, gas connections, water connections, system piping,\n startup and combustion testing must be completed by a qualified heating\n professional in accordance with Lochinvar instructions and all applicable\n codes. Warranty coverage is subject to the manufacturer’s current terms\n and conditions.\n \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Lochinvar","offers":[{"title":"Default Title","offer_id":53801158181048,"sku":null,"price":3300.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0914\/2376\/8760\/files\/LOC_Noble_20Boiler_F.jpg?v=1784828423"},{"product_id":"lochinvar-ng-nkc110n-noble-fire-tube-boiler-110-000-btu-high-efficiency","title":"Lochinvar (NG) NKC110N Noble Fire Tube Boiler | 110,000 BTU High Efficiency","description":"\u003cstyle\u003e\n .ws-nkb199 {\n max-width: 1100px;\n margin: 0 auto;\n color: #242424;\n font-family: inherit;\n line-height: 1.65;\n }\n\n .ws-nkb199 * {\n box-sizing: border-box;\n }\n\n .ws-nkb199 h2,\n .ws-nkb199 h3 {\n color: #222222;\n line-height: 1.25;\n margin-top: 0;\n }\n\n .ws-nkb199 h2 {\n margin-bottom: 16px;\n font-size: 30px;\n }\n\n .ws-nkb199 h3 {\n margin-bottom: 15px;\n font-size: 23px;\n }\n\n .ws-nkb199 p {\n margin: 0 0 17px;\n }\n\n .ws-nkb199-section {\n margin: 38px 0;\n }\n\n .ws-nkb199-highlights {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 14px;\n margin: 26px 0 32px;\n }\n\n .ws-nkb199-highlight {\n padding: 20px 15px;\n border: 1px solid #e2e2e2;\n border-radius: 12px;\n background: #f8f8f8;\n text-align: center;\n }\n\n .ws-nkb199-highlight strong {\n display: block;\n margin-bottom: 5px;\n color: #9e0929;\n font-size: 25px;\n line-height: 1.2;\n }\n\n .ws-nkb199-notice {\n margin: 28px 0;\n padding: 20px 22px;\n border-left: 5px solid #9e0929;\n border-radius: 8px;\n background: #f8eeee;\n }\n\n .ws-nkb199-notice strong {\n color: #850720;\n }\n\n .ws-nkb199-features {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 12px 28px;\n margin: 0;\n padding: 0;\n list-style: none;\n }\n\n .ws-nkb199-features li {\n position: relative;\n padding: 2px 0 2px 34px;\n }\n\n .ws-nkb199-features li::before {\n content: \"✓\";\n position: absolute;\n top: 0;\n left: 0;\n width: 23px;\n height: 23px;\n border-radius: 50%;\n background: #9e0929;\n color: #ffffff;\n font-size: 14px;\n font-weight: 700;\n line-height: 23px;\n text-align: center;\n }\n\n .ws-nkb199-applications {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 16px;\n }\n\n .ws-nkb199-application {\n padding: 22px;\n border: 1px solid #e1e1e1;\n border-radius: 12px;\n background: #ffffff;\n }\n\n .ws-nkb199-application strong {\n display: block;\n margin-bottom: 6px;\n color: #9e0929;\n font-size: 18px;\n }\n\n .ws-nkb199-radiant {\n padding: 28px;\n border-radius: 14px;\n background: #f5f5f5;\n }\n\n .ws-nkb199-spec-grid {\n display: grid;\n grid-template-columns: repeat(2, minmax(0, 1fr));\n gap: 20px;\n align-items: start;\n }\n\n .ws-nkb199-specs {\n width: 100%;\n border: 1px solid #dddddd;\n border-collapse: collapse;\n }\n\n .ws-nkb199-specs th,\n .ws-nkb199-specs td {\n padding: 13px 15px;\n border-bottom: 1px solid #dddddd;\n text-align: left;\n vertical-align: top;\n }\n\n .ws-nkb199-specs th {\n width: 43%;\n background: #f5f5f5;\n font-weight: 700;\n }\n\n .ws-nkb199-specs tr:last-child th,\n .ws-nkb199-specs tr:last-child td {\n border-bottom: 0;\n }\n\n .ws-nkb199-callout {\n margin-top: 30px;\n padding: 22px;\n border: 1px solid #e2c26a;\n border-radius: 10px;\n background: #fff9e8;\n }\n\n .ws-nkb199-disclaimer {\n margin-top: 25px;\n padding-top: 20px;\n border-top: 1px solid #dddddd;\n color: #555555;\n font-size: 14px;\n }\n\n @media screen and (max-width: 749px) {\n .ws-nkb199 h2 {\n font-size: 25px;\n }\n\n .ws-nkb199-highlights,\n .ws-nkb199-features,\n .ws-nkb199-applications,\n .ws-nkb199-spec-grid {\n grid-template-columns: 1fr;\n }\n\n .ws-nkb199-specs th,\n .ws-nkb199-specs td {\n display: block;\n width: 100%;\n }\n\n .ws-nkb199-specs th {\n padding-bottom: 5px;\n border-bottom: 0;\n }\n\n .ws-nkb199-specs td {\n padding-top: 5px;\n }\n }\n\u003c\/style\u003e\n\n\u003cdiv class=\"ws-nkb199\"\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch2\u003eLochinvar Noble NKC110N High-Efficiency Combi Boiler\u003c\/h2\u003e\n\n \u003cp\u003e\n The Lochinvar Noble NKC110N is a high-efficiency, wall-mounted\n condensing combi boiler designed to provide hydronic space heating and\n domestic hot water from one compact appliance. With a maximum input of\n 110,000 BTU and 95% AFUE efficiency, it delivers dependable residential\n comfort while helping reduce natural gas consumption.\n \u003c\/p\u003e\n\n \u003cp\u003e\n Its stainless steel fire-tube heat exchanger provides efficient heat\n transfer, low pressure drop and long-term corrosion resistance. The\n compact wall-mounted configuration also helps preserve valuable floor\n space in mechanical rooms, basements, garages and utility areas.\n \u003c\/p\u003e\n\n \u003cdiv class=\"ws-nkb199-highlights\"\u003e\n \u003cdiv class=\"ws-nkb199-highlight\"\u003e\n \u003cstrong\u003e110,000\u003c\/strong\u003e\n Maximum BTU Input\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-highlight\"\u003e\n \u003cstrong\u003e95%\u003c\/strong\u003e\n AFUE Efficiency\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-highlight\"\u003e\n \u003cstrong\u003e10:1\u003c\/strong\u003e\n Turndown Ratio\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-notice\"\u003e\n \u003cstrong\u003eSpace heating and domestic hot water:\u003c\/strong\u003e\n The NKC110N is a combi boiler that provides hot water for a hydronic\n space-heating system while also producing domestic hot water. Combining\n both functions in one wall-mounted appliance can reduce the need for a\n separate conventional water heater and simplify the mechanical-room\n layout.\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch3\u003eKey Features\u003c\/h3\u003e\n\n \u003cul class=\"ws-nkb199-features\"\u003e\n \u003cli\u003e110,000 BTU maximum input for residential heating applications\u003c\/li\u003e\n \u003cli\u003e11,000 BTU minimum input for efficient low-load operation\u003c\/li\u003e\n \u003cli\u003e95% AFUE high-efficiency condensing performance\u003c\/li\u003e\n \u003cli\u003e10:1 modulation turndown ratio for improved comfort\u003c\/li\u003e\n \u003cli\u003eProvides hydronic space heating and domestic hot water\u003c\/li\u003e\n \u003cli\u003eUp to 2.6 GPM domestic hot water at a 77°F temperature rise\u003c\/li\u003e\n \u003cli\u003eDurable ASME stainless steel fire-tube heat exchanger\u003c\/li\u003e\n \u003cli\u003eLow pressure-drop design provides greater piping flexibility\u003c\/li\u003e\n \u003cli\u003eSMART CONTROL™ digital operating system\u003c\/li\u003e\n \u003cli\u003eOutdoor-reset control capability\u003c\/li\u003e\n \u003cli\u003eUniversal vent adapter supports several approved vent materials\u003c\/li\u003e\n \u003cli\u003eCompact wall-mounted configuration saves floor space\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\n \u003cdiv class=\"ws-nkb199-applications\"\u003e\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eRadiant Floor Heating\u003c\/strong\u003e\n Provides controlled hot-water temperatures for comfortable and\n efficient in-floor radiant heating systems.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eDomestic Hot Water\u003c\/strong\u003e\n Produces household hot water and hydronic space heating from one\n compact combi appliance.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eBaseboard and Radiator Heating\u003c\/strong\u003e\n Can supply properly designed hydronic baseboard, panel radiator and\n traditional radiator systems.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eHydro-Air Systems\u003c\/strong\u003e\n Can serve as the heat source for compatible air handlers equipped\n with hydronic heating coils.\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section ws-nkb199-radiant\"\u003e\n \u003ch3\u003eDesigned for Radiant Floor Heating\u003c\/h3\u003e\n\n \u003cp\u003e\n The Noble NKC110N is well suited for residential hydronic radiant-floor\n heating installations. Its modulating burner adjusts boiler output as\n heating demand changes, helping maintain more consistent system-water\n temperatures and reducing unnecessary cycling.\n \u003c\/p\u003e\n\n \u003cp\u003e\n When paired with properly sized manifolds, pumps, mixing controls and\n zoning components, the NKC110N can provide heat for multiple rooms or\n heating zones while also supplying domestic hot water from the same\n appliance.\n \u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\n \u003cdiv class=\"ws-nkb199-spec-grid\"\u003e\n\n \u003ctable class=\"ws-nkb199-specs\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eManufacturer\u003c\/th\u003e\n \u003ctd\u003eLochinvar\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eModel\u003c\/th\u003e\n \u003ctd\u003eNKC110N\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eProduct Type\u003c\/th\u003e\n \u003ctd\u003eWall-mounted condensing fire-tube combi boiler\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n \u003ctd\u003eHydronic space heating and domestic hot water\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eFuel Type\u003c\/th\u003e\n \u003ctd\u003eNatural gas\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eMaximum Input\u003c\/th\u003e\n \u003ctd\u003e110,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eMinimum Input\u003c\/th\u003e\n \u003ctd\u003e11,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eDOE Heating Capacity\u003c\/th\u003e\n \u003ctd\u003e102,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eEfficiency\u003c\/th\u003e\n \u003ctd\u003e95% AFUE\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eTurndown Ratio\u003c\/th\u003e\n \u003ctd\u003e10:1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n\n \u003ctable class=\"ws-nkb199-specs\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eDomestic Hot Water\u003c\/th\u003e\n \u003ctd\u003eUp to 2.6 GPM at a 77°F temperature rise\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eSpace-Heating Connection\u003c\/th\u003e\n \u003ctd\u003e1 inch\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eDomestic Water Connection\u003c\/th\u003e\n \u003ctd\u003e3\/4 inch\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eVent Connection\u003c\/th\u003e\n \u003ctd\u003e3 inches\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eApproved Vent Materials\u003c\/th\u003e\n \u003ctd\u003ePVC, CPVC, polypropylene or approved stainless steel\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eElectrical Supply\u003c\/th\u003e\n \u003ctd\u003e120 VAC, 60 Hz, single phase\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eInstallation Type\u003c\/th\u003e\n \u003ctd\u003eIndoor wall-mounted installation\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eHeat Exchanger Warranty\u003c\/th\u003e\n \u003ctd\u003e10-year limited warranty\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eParts Warranty\u003c\/th\u003e\n \u003ctd\u003e5-year limited warranty\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eENERGY STAR® Certified\u003c\/th\u003e\n \u003ctd\u003eYes\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-callout\"\u003e\n \u003cstrong\u003eAltitude and system-sizing assistance:\u003c\/strong\u003e\n For installations above 4,500 feet, or for assistance determining whether\n this combi boiler is properly sized for your heating and domestic hot-water\n requirements, please call\n \u003cstrong\u003e1-800-663-7831\u003c\/strong\u003e before ordering.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-disclaimer\"\u003e\n Boiler selection should be based on a professional heat-loss calculation\n and domestic hot-water demand, not square footage alone. Installation,\n venting, gas connections, system piping, startup and combustion testing\n must be completed by a qualified heating professional in accordance with\n Lochinvar instructions and all applicable codes. Warranty coverage is\n subject to the manufacturer’s current terms and conditions.\n \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Lochinvar","offers":[{"title":"Default Title","offer_id":53801246982328,"sku":null,"price":3000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0914\/2376\/8760\/files\/LOC_Noble_20Boiler_F.jpg?v=1784828423"},{"product_id":"lochinvar-ng-nkb150n-noble-fire-tube-boiler-150-000-btu-high-efficiency","title":"Lochinvar (NG) NKB150N Noble Fire Tube Boiler | 150,000 BTU High Efficiency","description":"\u003cstyle\u003e\n .ws-nkb199 {\n max-width: 1100px;\n margin: 0 auto;\n color: #242424;\n font-family: inherit;\n line-height: 1.65;\n }\n\n .ws-nkb199 * {\n box-sizing: border-box;\n }\n\n .ws-nkb199 h2,\n .ws-nkb199 h3 {\n color: #222222;\n line-height: 1.25;\n margin-top: 0;\n }\n\n .ws-nkb199 h2 {\n margin-bottom: 16px;\n font-size: 30px;\n }\n\n .ws-nkb199 h3 {\n margin-bottom: 15px;\n font-size: 23px;\n }\n\n .ws-nkb199 p {\n margin: 0 0 17px;\n }\n\n .ws-nkb199-section {\n margin: 38px 0;\n }\n\n .ws-nkb199-highlights {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 14px;\n margin: 26px 0 32px;\n }\n\n .ws-nkb199-highlight {\n padding: 20px 15px;\n border: 1px solid #e2e2e2;\n border-radius: 12px;\n background: #f8f8f8;\n text-align: center;\n }\n\n .ws-nkb199-highlight strong {\n display: block;\n margin-bottom: 5px;\n color: #9e0929;\n font-size: 25px;\n line-height: 1.2;\n }\n\n .ws-nkb199-notice {\n margin: 28px 0;\n padding: 20px 22px;\n border-left: 5px solid #9e0929;\n border-radius: 8px;\n background: #f8eeee;\n }\n\n .ws-nkb199-notice strong {\n color: #850720;\n }\n\n .ws-nkb199-features {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 12px 28px;\n margin: 0;\n padding: 0;\n list-style: none;\n }\n\n .ws-nkb199-features li {\n position: relative;\n padding: 2px 0 2px 34px;\n }\n\n .ws-nkb199-features li::before {\n content: \"✓\";\n position: absolute;\n top: 0;\n left: 0;\n width: 23px;\n height: 23px;\n border-radius: 50%;\n background: #9e0929;\n color: #ffffff;\n font-size: 14px;\n font-weight: 700;\n line-height: 23px;\n text-align: center;\n }\n\n .ws-nkb199-applications {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 16px;\n }\n\n .ws-nkb199-application {\n padding: 22px;\n border: 1px solid #e1e1e1;\n border-radius: 12px;\n background: #ffffff;\n }\n\n .ws-nkb199-application strong {\n display: block;\n margin-bottom: 6px;\n color: #9e0929;\n font-size: 18px;\n }\n\n .ws-nkb199-radiant {\n padding: 28px;\n border-radius: 14px;\n background: #f5f5f5;\n }\n\n .ws-nkb199-spec-grid {\n display: grid;\n grid-template-columns: repeat(2, minmax(0, 1fr));\n gap: 20px;\n align-items: start;\n }\n\n .ws-nkb199-specs {\n width: 100%;\n border: 1px solid #dddddd;\n border-collapse: collapse;\n }\n\n .ws-nkb199-specs th,\n .ws-nkb199-specs td {\n padding: 13px 15px;\n border-bottom: 1px solid #dddddd;\n text-align: left;\n vertical-align: top;\n }\n\n .ws-nkb199-specs th {\n width: 43%;\n background: #f5f5f5;\n font-weight: 700;\n }\n\n .ws-nkb199-specs tr:last-child th,\n .ws-nkb199-specs tr:last-child td {\n border-bottom: 0;\n }\n\n .ws-nkb199-callout {\n margin-top: 30px;\n padding: 22px;\n border: 1px solid #e2c26a;\n border-radius: 10px;\n background: #fff9e8;\n }\n\n .ws-nkb199-disclaimer {\n margin-top: 25px;\n padding-top: 20px;\n border-top: 1px solid #dddddd;\n color: #555555;\n font-size: 14px;\n }\n\n @media screen and (max-width: 749px) {\n .ws-nkb199 h2 {\n font-size: 25px;\n }\n\n .ws-nkb199-highlights,\n .ws-nkb199-features,\n .ws-nkb199-applications,\n .ws-nkb199-spec-grid {\n grid-template-columns: 1fr;\n }\n\n .ws-nkb199-specs th,\n .ws-nkb199-specs td {\n display: block;\n width: 100%;\n }\n\n .ws-nkb199-specs th {\n padding-bottom: 5px;\n border-bottom: 0;\n }\n\n .ws-nkb199-specs td {\n padding-top: 5px;\n }\n }\n\u003c\/style\u003e\n\n\u003cdiv class=\"ws-nkb199\"\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch2\u003eLochinvar Noble NKB150N High-Efficiency Fire Tube Boiler\u003c\/h2\u003e\n\n \u003cp\u003e\n The Lochinvar Noble NKB150N is a high-efficiency, wall-mounted\n condensing boiler designed to provide dependable heat for residential\n hydronic systems. With a maximum input of 150,000 BTU and 95% AFUE\n efficiency, it delivers strong heating performance while helping reduce\n natural gas consumption.\n \u003c\/p\u003e\n\n \u003cp\u003e\n Its stainless steel fire-tube heat exchanger provides efficient heat\n transfer, low pressure drop and long-term corrosion resistance. The\n compact wall-mounted configuration also helps preserve valuable floor\n space in mechanical rooms, basements, garages and utility areas.\n \u003c\/p\u003e\n\n \u003cdiv class=\"ws-nkb199-highlights\"\u003e\n \u003cdiv class=\"ws-nkb199-highlight\"\u003e\n \u003cstrong\u003e150,000\u003c\/strong\u003e\n Maximum BTU Input\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-highlight\"\u003e\n \u003cstrong\u003e95%\u003c\/strong\u003e\n AFUE Efficiency\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-highlight\"\u003e\n \u003cstrong\u003e10:1\u003c\/strong\u003e\n Turndown Ratio\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-notice\"\u003e\n \u003cstrong\u003eHeating-only boiler:\u003c\/strong\u003e\n The NKB150N heats water for a hydronic space-heating system. It does\n not produce domestic hot water directly like a Lochinvar NKC combi\n boiler. The NKB150N may be incorporated into a properly designed\n system with a compatible indirect water heater when domestic hot-water\n production is needed.\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch3\u003eKey Features\u003c\/h3\u003e\n\n \u003cul class=\"ws-nkb199-features\"\u003e\n \u003cli\u003e150,000 BTU maximum input for residential heating loads\u003c\/li\u003e\n \u003cli\u003e15,000 BTU minimum input for efficient low-load operation\u003c\/li\u003e\n \u003cli\u003e95% AFUE high-efficiency condensing performance\u003c\/li\u003e\n \u003cli\u003e10:1 modulation turndown ratio for improved comfort\u003c\/li\u003e\n \u003cli\u003eDurable ASME stainless steel fire-tube heat exchanger\u003c\/li\u003e\n \u003cli\u003eLow pressure-drop design provides greater piping flexibility\u003c\/li\u003e\n \u003cli\u003eSMART CONTROL™ digital operating control\u003c\/li\u003e\n \u003cli\u003eOutdoor-reset control capability\u003c\/li\u003e\n \u003cli\u003eBuilt-in cascading sequencer for systems with multiple boilers\u003c\/li\u003e\n \u003cli\u003eUniversal connector supports several approved vent materials\u003c\/li\u003e\n \u003cli\u003eCompact wall-mounted configuration saves floor space\u003c\/li\u003e\n \u003cli\u003eENERGY STAR® certified residential boiler\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\n \u003cdiv class=\"ws-nkb199-applications\"\u003e\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eRadiant Floor Heating\u003c\/strong\u003e\n Provides controlled hot-water temperatures for comfortable and\n efficient in-floor radiant heating systems.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eMulti-Zone Hydronic Systems\u003c\/strong\u003e\n Suitable for homes with several independently controlled heating\n zones and varying heating demands.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eBaseboard and Radiator Heating\u003c\/strong\u003e\n Can supply properly designed hydronic baseboard, panel radiator and\n traditional radiator systems.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eHydro-Air Systems\u003c\/strong\u003e\n Can serve as the heat source for compatible air handlers equipped\n with hydronic heating coils.\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section ws-nkb199-radiant\"\u003e\n \u003ch3\u003eDesigned for Radiant Floor Heating\u003c\/h3\u003e\n\n \u003cp\u003e\n The Noble NKB150N is well suited for residential hydronic radiant-floor\n heating installations. Its modulating burner adjusts boiler output as\n heating demand changes, helping maintain more consistent system-water\n temperatures and reducing unnecessary cycling.\n \u003c\/p\u003e\n\n \u003cp\u003e\n When paired with properly sized manifolds, pumps, mixing controls and\n zoning components, the NKB150N can provide heat for multiple rooms,\n floors or heating zones from one central boiler.\n \u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\n \u003cdiv class=\"ws-nkb199-spec-grid\"\u003e\n\n \u003ctable class=\"ws-nkb199-specs\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eManufacturer\u003c\/th\u003e\n \u003ctd\u003eLochinvar\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eModel\u003c\/th\u003e\n \u003ctd\u003eNKB150N\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eProduct Type\u003c\/th\u003e\n \u003ctd\u003eWall-mounted condensing fire-tube boiler\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n \u003ctd\u003eHydronic space heating\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eFuel Type\u003c\/th\u003e\n \u003ctd\u003eNatural gas\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eMaximum Input\u003c\/th\u003e\n \u003ctd\u003e150,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eMinimum Input\u003c\/th\u003e\n \u003ctd\u003e15,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eDOE Heating Capacity\u003c\/th\u003e\n \u003ctd\u003e139,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eNet AHRI Rating\u003c\/th\u003e\n \u003ctd\u003e121,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eEfficiency\u003c\/th\u003e\n \u003ctd\u003e95% AFUE\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eTurndown Ratio\u003c\/th\u003e\n \u003ctd\u003e10:1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eWater Connections\u003c\/th\u003e\n \u003ctd\u003e1 inch\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n\n \u003ctable class=\"ws-nkb199-specs\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eGas Connection\u003c\/th\u003e\n \u003ctd\u003e1\/2 inch\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eVent Options\u003c\/th\u003e\n \u003ctd\u003e\n 2-inch venting up to 50 equivalent feet or 3-inch venting up to\n 100 equivalent feet, subject to installation requirements\n \u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eApproved Vent Materials\u003c\/th\u003e\n \u003ctd\u003ePVC, CPVC, polypropylene or approved stainless steel\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eElectrical Supply\u003c\/th\u003e\n \u003ctd\u003e120 VAC, 60 Hz, single phase\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eApproximate Dimensions\u003c\/th\u003e\n \u003ctd\u003e32-7\/8\" H × 17-1\/16\" W × 18\" D\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eShipping Weight\u003c\/th\u003e\n \u003ctd\u003eApproximately 132 lb.\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eHeat Exchanger Warranty\u003c\/th\u003e\n \u003ctd\u003e10-year limited warranty\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eParts Warranty\u003c\/th\u003e\n \u003ctd\u003e5-year limited warranty\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eENERGY STAR® Certified\u003c\/th\u003e\n \u003ctd\u003eYes\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-callout\"\u003e\n \u003cstrong\u003eAltitude and system-sizing assistance:\u003c\/strong\u003e\n For installations above 4,500 feet, or for assistance determining whether\n this boiler is properly sized for your heating system, please call\n \u003cstrong\u003e1-800-663-7831\u003c\/strong\u003e before ordering.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-disclaimer\"\u003e\n Boiler selection should be based on a professional heat-loss calculation,\n not square footage alone. Installation, venting, gas connections, system\n piping, startup and combustion testing must be completed by a qualified\n heating professional in accordance with Lochinvar instructions and all\n applicable codes. Warranty coverage is subject to the manufacturer’s\n current terms and conditions.\n \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Lochinvar","offers":[{"title":"Default Title","offer_id":53801288073400,"sku":null,"price":3000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0914\/2376\/8760\/files\/LOC_Noble_20Boiler_F.jpg?v=1784828423"},{"product_id":"lochinvar-ng-nkb110n-noble-fire-tube-boiler-110-000-btu-high-efficiency","title":"Lochinvar (NG) NKB110N Noble Fire Tube Boiler | 110,000 BTU High Efficiency","description":"\u003cstyle\u003e\n .ws-nkb199 {\n max-width: 1100px;\n margin: 0 auto;\n color: #242424;\n font-family: inherit;\n line-height: 1.65;\n }\n\n .ws-nkb199 * {\n box-sizing: border-box;\n }\n\n .ws-nkb199 h2,\n .ws-nkb199 h3 {\n color: #222222;\n line-height: 1.25;\n margin-top: 0;\n }\n\n .ws-nkb199 h2 {\n margin-bottom: 16px;\n font-size: 30px;\n }\n\n .ws-nkb199 h3 {\n margin-bottom: 15px;\n font-size: 23px;\n }\n\n .ws-nkb199 p {\n margin: 0 0 17px;\n }\n\n .ws-nkb199-section {\n margin: 38px 0;\n }\n\n .ws-nkb199-highlights {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 14px;\n margin: 26px 0 32px;\n }\n\n .ws-nkb199-highlight {\n padding: 20px 15px;\n border: 1px solid #e2e2e2;\n border-radius: 12px;\n background: #f8f8f8;\n text-align: center;\n }\n\n .ws-nkb199-highlight strong {\n display: block;\n margin-bottom: 5px;\n color: #9e0929;\n font-size: 25px;\n line-height: 1.2;\n }\n\n .ws-nkb199-notice {\n margin: 28px 0;\n padding: 20px 22px;\n border-left: 5px solid #9e0929;\n border-radius: 8px;\n background: #f8eeee;\n }\n\n .ws-nkb199-notice strong {\n color: #850720;\n }\n\n .ws-nkb199-features {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 12px 28px;\n margin: 0;\n padding: 0;\n list-style: none;\n }\n\n .ws-nkb199-features li {\n position: relative;\n padding: 2px 0 2px 34px;\n }\n\n .ws-nkb199-features li::before {\n content: \"✓\";\n position: absolute;\n top: 0;\n left: 0;\n width: 23px;\n height: 23px;\n border-radius: 50%;\n background: #9e0929;\n color: #ffffff;\n font-size: 14px;\n font-weight: 700;\n line-height: 23px;\n text-align: center;\n }\n\n .ws-nkb199-applications {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 16px;\n }\n\n .ws-nkb199-application {\n padding: 22px;\n border: 1px solid #e1e1e1;\n border-radius: 12px;\n background: #ffffff;\n }\n\n .ws-nkb199-application strong {\n display: block;\n margin-bottom: 6px;\n color: #9e0929;\n font-size: 18px;\n }\n\n .ws-nkb199-radiant {\n padding: 28px;\n border-radius: 14px;\n background: #f5f5f5;\n }\n\n .ws-nkb199-spec-grid {\n display: grid;\n grid-template-columns: repeat(2, minmax(0, 1fr));\n gap: 20px;\n align-items: start;\n }\n\n .ws-nkb199-specs {\n width: 100%;\n border: 1px solid #dddddd;\n border-collapse: collapse;\n }\n\n .ws-nkb199-specs th,\n .ws-nkb199-specs td {\n padding: 13px 15px;\n border-bottom: 1px solid #dddddd;\n text-align: left;\n vertical-align: top;\n }\n\n .ws-nkb199-specs th {\n width: 43%;\n background: #f5f5f5;\n font-weight: 700;\n }\n\n .ws-nkb199-specs tr:last-child th,\n .ws-nkb199-specs tr:last-child td {\n border-bottom: 0;\n }\n\n .ws-nkb199-callout {\n margin-top: 30px;\n padding: 22px;\n border: 1px solid #e2c26a;\n border-radius: 10px;\n background: #fff9e8;\n }\n\n .ws-nkb199-disclaimer {\n margin-top: 25px;\n padding-top: 20px;\n border-top: 1px solid #dddddd;\n color: #555555;\n font-size: 14px;\n }\n\n @media screen and (max-width: 749px) {\n .ws-nkb199 h2 {\n font-size: 25px;\n }\n\n .ws-nkb199-highlights,\n .ws-nkb199-features,\n .ws-nkb199-applications,\n .ws-nkb199-spec-grid {\n grid-template-columns: 1fr;\n }\n\n .ws-nkb199-specs th,\n .ws-nkb199-specs td {\n display: block;\n width: 100%;\n }\n\n .ws-nkb199-specs th {\n padding-bottom: 5px;\n border-bottom: 0;\n }\n\n .ws-nkb199-specs td {\n padding-top: 5px;\n }\n }\n\u003c\/style\u003e\n\n\u003cdiv class=\"ws-nkb199\"\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch2\u003eLochinvar Noble NKB110N High-Efficiency Fire Tube Boiler\u003c\/h2\u003e\n\n \u003cp\u003e\n The Lochinvar Noble NKB110N is a high-efficiency, wall-mounted\n condensing boiler designed to provide dependable heat for residential\n hydronic systems. With a maximum input of 110,000 BTU and 95% AFUE\n efficiency, it delivers reliable heating performance while helping\n reduce natural gas consumption.\n \u003c\/p\u003e\n\n \u003cp\u003e\n Its stainless steel fire-tube heat exchanger provides efficient heat\n transfer, low pressure drop and long-term corrosion resistance. The\n compact wall-mounted configuration also helps preserve valuable floor\n space in mechanical rooms, basements, garages and utility areas.\n \u003c\/p\u003e\n\n \u003cdiv class=\"ws-nkb199-highlights\"\u003e\n \u003cdiv class=\"ws-nkb199-highlight\"\u003e\n \u003cstrong\u003e110,000\u003c\/strong\u003e\n Maximum BTU Input\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-highlight\"\u003e\n \u003cstrong\u003e95%\u003c\/strong\u003e\n AFUE Efficiency\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-highlight\"\u003e\n \u003cstrong\u003e10:1\u003c\/strong\u003e\n Turndown Ratio\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-notice\"\u003e\n \u003cstrong\u003eHeating-only boiler:\u003c\/strong\u003e\n The NKB110N heats water for a hydronic space-heating system. It does\n not produce domestic hot water directly like a Lochinvar NKC combi\n boiler. The NKB110N may be incorporated into a properly designed\n system with a compatible indirect water heater when domestic hot-water\n production is needed.\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch3\u003eKey Features\u003c\/h3\u003e\n\n \u003cul class=\"ws-nkb199-features\"\u003e\n \u003cli\u003e110,000 BTU maximum input for residential heating loads\u003c\/li\u003e\n \u003cli\u003e11,000 BTU minimum input for efficient low-load operation\u003c\/li\u003e\n \u003cli\u003e95% AFUE high-efficiency condensing performance\u003c\/li\u003e\n \u003cli\u003e10:1 modulation turndown ratio for improved comfort\u003c\/li\u003e\n \u003cli\u003eDurable ASME stainless steel fire-tube heat exchanger\u003c\/li\u003e\n \u003cli\u003eLow pressure-drop design provides greater piping flexibility\u003c\/li\u003e\n \u003cli\u003eSMART CONTROL™ digital operating control\u003c\/li\u003e\n \u003cli\u003eOutdoor-reset control capability\u003c\/li\u003e\n \u003cli\u003eBuilt-in cascading control for systems with multiple boilers\u003c\/li\u003e\n \u003cli\u003eUniversal connector supports several approved vent materials\u003c\/li\u003e\n \u003cli\u003eCompact wall-mounted configuration saves floor space\u003c\/li\u003e\n \u003cli\u003eENERGY STAR® certified residential boiler\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\n \u003cdiv class=\"ws-nkb199-applications\"\u003e\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eRadiant Floor Heating\u003c\/strong\u003e\n Provides controlled hot-water temperatures for comfortable and\n efficient in-floor radiant heating systems.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eMulti-Zone Hydronic Systems\u003c\/strong\u003e\n Suitable for homes with independently controlled heating zones and\n varying heating demands.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eBaseboard and Radiator Heating\u003c\/strong\u003e\n Can supply properly designed hydronic baseboard, panel radiator and\n traditional radiator systems.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-application\"\u003e\n \u003cstrong\u003eHydro-Air Systems\u003c\/strong\u003e\n Can serve as the heat source for compatible air handlers equipped\n with hydronic heating coils.\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section ws-nkb199-radiant\"\u003e\n \u003ch3\u003eDesigned for Radiant Floor Heating\u003c\/h3\u003e\n\n \u003cp\u003e\n The Noble NKB110N is well suited for residential hydronic radiant-floor\n heating installations. Its modulating burner adjusts boiler output as\n heating demand changes, helping maintain more consistent system-water\n temperatures and reducing unnecessary cycling.\n \u003c\/p\u003e\n\n \u003cp\u003e\n When paired with properly sized manifolds, pumps, mixing controls and\n zoning components, the NKB110N can provide heat for multiple rooms,\n floors or heating zones from one central boiler.\n \u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-section\"\u003e\n \u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\n \u003cdiv class=\"ws-nkb199-spec-grid\"\u003e\n\n \u003ctable class=\"ws-nkb199-specs\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eManufacturer\u003c\/th\u003e\n \u003ctd\u003eLochinvar\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eModel\u003c\/th\u003e\n \u003ctd\u003eNKB110N\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eProduct Type\u003c\/th\u003e\n \u003ctd\u003eWall-mounted condensing fire-tube boiler\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eApplication\u003c\/th\u003e\n \u003ctd\u003eHydronic space heating\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eFuel Type\u003c\/th\u003e\n \u003ctd\u003eNatural gas\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eMaximum Input\u003c\/th\u003e\n \u003ctd\u003e110,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eMinimum Input\u003c\/th\u003e\n \u003ctd\u003e11,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eDOE Heating Capacity\u003c\/th\u003e\n \u003ctd\u003e102,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eNet AHRI Rating\u003c\/th\u003e\n \u003ctd\u003e89,000 BTU\/hr\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eEfficiency\u003c\/th\u003e\n \u003ctd\u003e95% AFUE\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eTurndown Ratio\u003c\/th\u003e\n \u003ctd\u003e10:1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eWater Connections\u003c\/th\u003e\n \u003ctd\u003e1 inch\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n\n \u003ctable class=\"ws-nkb199-specs\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eGas Connection\u003c\/th\u003e\n \u003ctd\u003e1\/2 inch\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eVent Options\u003c\/th\u003e\n \u003ctd\u003e\n 2-inch venting up to 100 equivalent feet, subject to\n installation requirements\n \u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eApproved Vent Materials\u003c\/th\u003e\n \u003ctd\u003ePVC, CPVC, polypropylene or approved stainless steel\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eElectrical Supply\u003c\/th\u003e\n \u003ctd\u003e120 VAC, 60 Hz, single phase\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eApproximate Dimensions\u003c\/th\u003e\n \u003ctd\u003e24\" H × 17-1\/4\" W × 18\" D\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eInstallation Type\u003c\/th\u003e\n \u003ctd\u003eIndoor wall-mounted installation\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eHeat Exchanger Warranty\u003c\/th\u003e\n \u003ctd\u003e10-year limited warranty\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eParts Warranty\u003c\/th\u003e\n \u003ctd\u003e5-year limited warranty\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\"\u003eENERGY STAR® Certified\u003c\/th\u003e\n \u003ctd\u003eYes\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-callout\"\u003e\n \u003cstrong\u003eAltitude and system-sizing assistance:\u003c\/strong\u003e\n For installations above 4,500 feet, or for assistance determining whether\n this boiler is properly sized for your heating system, please call\n \u003cstrong\u003e1-800-663-7831\u003c\/strong\u003e before ordering.\n \u003c\/div\u003e\n\n \u003cdiv class=\"ws-nkb199-disclaimer\"\u003e\n Boiler selection should be based on a professional heat-loss calculation,\n not square footage alone. Installation, venting, gas connections, system\n piping, startup and combustion testing must be completed by a qualified\n heating professional in accordance with Lochinvar instructions and all\n applicable codes. Warranty coverage is subject to the manufacturer’s\n current terms and conditions.\n \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Lochinvar","offers":[{"title":"Default Title","offer_id":53801309831352,"sku":null,"price":2700.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0914\/2376\/8760\/files\/LOC_Noble_20Boiler_F.jpg?v=1784828423"}],"url":"https:\/\/warmingsystemshydronic.com\/collections\/residential-boilers.oembed","provider":"Warming Systems Hydronic","version":"1.0","type":"link"}