{"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","url":"https:\/\/warmingsystemshydronic.com\/products\/lochinvar-ng-nkb199n-noble-fire-tube-boiler-199-000-btu-high-efficiency","provider":"Warming Systems Hydronic","version":"1.0","type":"link"}