{"product_id":"weil-mclain-ab-120h-aquabalance-series-2-120000-btu-heat-only-condensing-gas-boiler","title":"Weil-McLain AB-120H AquaBalance Series 2 120,000 BTU Heat-Only Condensing Gas Boiler","description":"\u003ch2\u003eWeil-McLain AB-120H AquaBalance Series 2 120,000 BTU Heat-Only Condensing Gas Boiler\u003c\/h2\u003e\n\u003cp\u003eWeil-McLain is a leading North American Brand of hydronic comfort heating systems for residential, commercial and institutional buildings, since 1881. Contractors, engineers, architects, homeowners, and facility managers alike rely on Weil-McLain boilers for their comfort heating needs. Installed in homes, offices, schools, restaurants, hotels, and other facilities throughout North America, the Weil-McLain brand is among the most trusted and often used in the building industry.\u003c\/p\u003e\n\u003ch5\u003eFeatures\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eCompact design to increase placement options\u003c\/li\u003e\n\u003cli\u003eHeavy gauge insulated jacket provides quiet operation\u003c\/li\u003e\n\u003cli\u003eContractor-friendly removable sides\u003c\/li\u003e\n\u003cli\u003ePre-wired, plug-in ready electrical design\u003c\/li\u003e\n\u003cli\u003eCommercial grade 120V power 6' cord with 3 prong plug\u003c\/li\u003e\n\u003cli\u003e24 VAC thermostat relay, fuse protected with prewired terminal strip\u003c\/li\u003e\n\u003cli\u003eHoneywell control with digital display\u003c\/li\u003e\n\u003cli\u003eWall mounting bracket and hardware included\u003c\/li\u003e\n\u003cli\u003eUnique \"3-in-1\" vent adapter readily accepts PVC, CPVC, SS, or PP vent materials\u003c\/li\u003e\n\u003cli\u003eMultiple vent options includes direct vent, 2 pipes or concentric, through roof or sidewall\u003c\/li\u003e\n\u003cli\u003eStrategically placed sensors used instead of additional bulky boiler controls\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5 data-start=\"0\" data-end=\"30\"\u003eWhat Our Experts Think\u003c\/h5\u003e\n\u003cul data-start=\"31\" data-end=\"734\"\u003e\n\u003cli data-start=\"31\" data-end=\"279\"\u003e\n\u003cp data-start=\"33\" data-end=\"279\"\u003e\u003cstrong data-start=\"33\" data-end=\"65\"\u003eEfficient condensing design:\u003c\/strong\u003e The \u003cstrong data-start=\"70\" data-end=\"158\"\u003eWeil‑McLain AB‑120H AquaBalance Series 2 120,000 BTU Heat‑Only Condensing Gas Boiler\u003c\/strong\u003e uses condensing technology to extract more heat from combustion, lowering fuel costs compared to non‑condensing units.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"280\" data-end=\"439\"\u003e\n\u003cp data-start=\"282\" data-end=\"439\"\u003e\u003cstrong data-start=\"282\" data-end=\"302\"\u003eHeat‑only focus:\u003c\/strong\u003e Built to deliver \u003cstrong data-start=\"320\" data-end=\"342\"\u003espace heating only\u003c\/strong\u003e, it pairs well with a separate domestic hot‑water system, keeping design simple and efficient.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"440\" data-end=\"579\"\u003e\n\u003cp data-start=\"442\" data-end=\"579\"\u003e\u003cstrong data-start=\"442\" data-end=\"476\"\u003eQuiet, dependable performance:\u003c\/strong\u003e Smooth combustion and well‑engineered components provide \u003cstrong data-start=\"534\" data-end=\"555\"\u003econsistent warmth\u003c\/strong\u003e and stable operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"580\" data-end=\"734\"\u003e\n\u003cp data-start=\"582\" data-end=\"734\"\u003e\u003cstrong data-start=\"582\" data-end=\"615\"\u003eDurable and service‑friendly:\u003c\/strong\u003e Corrosion‑resistant heat exchanger and accessible service points make maintenance easier and help extend service life.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5 data-start=\"736\" data-end=\"755\"\u003eProduct Q\u0026amp;A\u003c\/h5\u003e\n\u003cul data-start=\"756\" data-end=\"1403\"\u003e\n\u003cli data-start=\"756\" data-end=\"942\"\u003e\n\u003cp data-start=\"758\" data-end=\"942\"\u003e\u003cstrong data-start=\"758\" data-end=\"789\"\u003eWhat does “heat‑only” mean?\u003c\/strong\u003e\u003cbr data-start=\"789\" data-end=\"792\"\u003eThe boiler provides \u003cstrong data-start=\"814\" data-end=\"836\"\u003espace heating only\u003c\/strong\u003e — it does not produce domestic hot water; a separate water heater or indirect tank is required for DHW.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"943\" data-end=\"1073\"\u003e\n\u003cp data-start=\"945\" data-end=\"1073\"\u003e\u003cstrong data-start=\"945\" data-end=\"971\"\u003eWhat fuel does it use?\u003c\/strong\u003e\u003cbr data-start=\"971\" data-end=\"974\"\u003e\u003cstrong data-start=\"976\" data-end=\"991\"\u003eNatural gas\u003c\/strong\u003e; a licensed HVAC tech can install a propane conversion kit if LP gas is needed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1074\" data-end=\"1242\"\u003e\n\u003cp data-start=\"1076\" data-end=\"1242\"\u003e\u003cstrong data-start=\"1076\" data-end=\"1104\"\u003eWhere is this best used?\u003c\/strong\u003e\u003cbr data-start=\"1104\" data-end=\"1107\"\u003eIdeal for \u003cstrong data-start=\"1119\" data-end=\"1170\"\u003esingle‑family homes or light commercial systems\u003c\/strong\u003e with separate hot water sources that need efficient hydronic heating.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1243\" data-end=\"1403\"\u003e\n\u003cp data-start=\"1245\" data-end=\"1403\"\u003e\u003cstrong data-start=\"1245\" data-end=\"1269\"\u003eHow efficient is it?\u003c\/strong\u003e\u003cbr data-start=\"1269\" data-end=\"1272\"\u003eCondensing design boosts heat extraction from exhaust gases, improving \u003cstrong data-start=\"1345\" data-end=\"1374\"\u003eoverall system efficiency\u003c\/strong\u003e and lowering operating cost.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5 data-start=\"1405\" data-end=\"1429\"\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cul data-start=\"1430\" data-end=\"2207\"\u003e\n\u003cli data-start=\"1430\" data-end=\"1609\"\u003e\n\u003cp data-start=\"1432\" data-end=\"1609\"\u003e\u003cstrong data-start=\"1432\" data-end=\"1462\"\u003eAnnual professional check:\u003c\/strong\u003e Have a licensed HVAC technician inspect and tune the boiler before the heating season — burner, heat exchanger, condensate system, and controls.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1610\" data-end=\"1740\"\u003e\n\u003cp data-start=\"1612\" data-end=\"1740\"\u003e\u003cstrong data-start=\"1612\" data-end=\"1639\"\u003eClear condensate lines:\u003c\/strong\u003e Ensure condensate drains and traps are clear and properly pitched to avoid clogs or freeze issues.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1741\" data-end=\"1850\"\u003e\n\u003cp data-start=\"1743\" data-end=\"1850\"\u003e\u003cstrong data-start=\"1743\" data-end=\"1779\"\u003eMonitor pressure \u0026amp; water levels:\u003c\/strong\u003e Maintain correct boiler pressure and verify expansion tank function.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1851\" data-end=\"1963\"\u003e\n\u003cp data-start=\"1853\" data-end=\"1963\"\u003e\u003cstrong data-start=\"1853\" data-end=\"1879\"\u003eClean vents \u0026amp; intakes:\u003c\/strong\u003e Keep air intake and exhaust terminations free of debris to ensure safe operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1964\" data-end=\"2069\"\u003e\n\u003cp data-start=\"1966\" data-end=\"2069\"\u003e\u003cstrong data-start=\"1966\" data-end=\"1988\"\u003eInspect for leaks:\u003c\/strong\u003e Periodically check valves, joints, and piping for signs of water or gas leaks.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2070\" data-end=\"2207\"\u003e\n\u003cp data-start=\"2072\" data-end=\"2207\"\u003e\u003cstrong data-start=\"2072\" data-end=\"2099\"\u003eMaintain water quality:\u003c\/strong\u003e Use recommended inhibitors and schedule periodic system flushing to reduce scale and extend component life.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Weil-McLain","offers":[{"title":"Default Title","offer_id":54162688803100,"sku":"W383100045","price":2917.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/0622\/4924\/files\/Weil-McLain-AB-120H-AquaBalance-Series-2-120000-BTU-Heat-Only-Condensing-Gas-Boiler-Main-Image_27.jpg?v=1780152194","url":"https:\/\/www.mybackyardzone.com\/products\/weil-mclain-ab-120h-aquabalance-series-2-120000-btu-heat-only-condensing-gas-boiler","provider":"Backup Power Made Simple","version":"1.0","type":"link"}