{"product_id":"weil-mclain-ultra-series-4-155000-btu-condensing-gas-boiler","title":"Weil-McLain Ultra Series 4 155,000 BTU Condensing Gas Boiler","description":"\u003ch2\u003eWeil-McLain Ultra Series 4 155,000 BTU 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\u003eCast aluminum coated heat exchanger\u003c\/li\u003e\n\u003cli\u003eDesigned to operate in low temperature condensing applications\u003c\/li\u003e\n\u003cli\u003eOutdoor reset and domestic hot water priority\u003c\/li\u003e\n\u003cli\u003eModulates with 5:1 turn-down ratio\u003c\/li\u003e\n\u003cli\u003eHigh grade stainless steel burner features quiet operation\u003c\/li\u003e\n\u003cli\u003eU-Control gives the power for easy set-up and maintenance\u003c\/li\u003e\n\u003cli\u003eMultiple set-up and zone options\u003c\/li\u003e\n\u003cli\u003eSystem sensing recognizes system and outdoor temperatures\u003c\/li\u003e\n\u003cli\u003eTemperature management for up to three different set-points\u003c\/li\u003e\n\u003cli\u003eControl multiple boilers from a single control panel\u003c\/li\u003e\n\u003cli\u003eStandard screen messages provide service alerts and maintenance reminders\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=\"781\"\u003e\n\u003cli data-start=\"31\" data-end=\"274\"\u003e\n\u003cp data-start=\"33\" data-end=\"274\"\u003e\u003cstrong data-start=\"33\" data-end=\"76\"\u003eHigh-efficiency condensing performance:\u003c\/strong\u003e The \u003cstrong data-start=\"81\" data-end=\"145\"\u003eWeil-McLain Ultra Series 4 155,000 BTU Condensing Gas Boiler\u003c\/strong\u003e delivers \u003cstrong data-start=\"155\" data-end=\"174\"\u003eup to ~95% AFUE\u003c\/strong\u003e, converting more fuel into usable heat and cutting energy costs compared to conventional boilers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"275\" data-end=\"456\"\u003e\n\u003cp data-start=\"277\" data-end=\"456\"\u003e\u003cstrong data-start=\"277\" data-end=\"302\"\u003ePowerful heat output:\u003c\/strong\u003e With \u003cstrong data-start=\"308\" data-end=\"334\"\u003e155,000 BTU\/h capacity\u003c\/strong\u003e, it’s ideal for \u003cstrong data-start=\"351\" data-end=\"414\"\u003elarge homes, multi-family units, or light commercial spaces\u003c\/strong\u003e needing robust, reliable hydronic heat.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"457\" data-end=\"594\"\u003e\n\u003cp data-start=\"459\" data-end=\"594\"\u003e\u003cstrong data-start=\"459\" data-end=\"487\"\u003eQuiet, smooth operation:\u003c\/strong\u003e Engineered for stable combustion and reduced noise, offering dependable comfort with minimal disruption.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"595\" data-end=\"781\"\u003e\n\u003cp data-start=\"597\" data-end=\"781\"\u003e\u003cstrong data-start=\"597\" data-end=\"630\"\u003eDurable and service-friendly:\u003c\/strong\u003e Weil-McLain’s design emphasizes \u003cstrong data-start=\"663\" data-end=\"712\"\u003elong-lasting components, corrosion resistance\u003c\/strong\u003e, and accessible service points — making maintenance easier for pros.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5 data-start=\"783\" data-end=\"802\"\u003eProduct Q\u0026amp;A\u003c\/h5\u003e\n\u003cul data-start=\"803\" data-end=\"1458\"\u003e\n\u003cli data-start=\"803\" data-end=\"991\"\u003e\n\u003cp data-start=\"805\" data-end=\"991\"\u003e\u003cstrong data-start=\"805\" data-end=\"837\"\u003eWhat type of boiler is this?\u003c\/strong\u003e\u003cbr data-start=\"837\" data-end=\"840\"\u003eA \u003cstrong data-start=\"844\" data-end=\"885\"\u003ehigh-efficiency condensing gas boiler\u003c\/strong\u003e that uses advanced heat-recovery technology to extract extra heat from combustion gases before venting.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"992\" data-end=\"1168\"\u003e\n\u003cp data-start=\"994\" data-end=\"1168\"\u003e\u003cstrong data-start=\"994\" data-end=\"1035\"\u003eWhat heating systems does it support?\u003c\/strong\u003e\u003cbr data-start=\"1035\" data-end=\"1038\"\u003eWorks with \u003cstrong data-start=\"1051\" data-end=\"1133\"\u003ehydronic baseboard, radiant floor, fan-coils, and chilled-water reheat systems\u003c\/strong\u003e where hot water heating is used.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1169\" data-end=\"1298\"\u003e\n\u003cp data-start=\"1171\" data-end=\"1298\"\u003e\u003cstrong data-start=\"1171\" data-end=\"1197\"\u003eWhat fuel does it use?\u003c\/strong\u003e\u003cbr data-start=\"1197\" data-end=\"1200\"\u003eNatural gas (propane conversion kits are often available separately via qualified installers).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1299\" data-end=\"1458\"\u003e\n\u003cp data-start=\"1301\" data-end=\"1458\"\u003e\u003cstrong data-start=\"1301\" data-end=\"1337\"\u003eDoes it require special venting?\u003c\/strong\u003e\u003cbr data-start=\"1337\" data-end=\"1340\"\u003eYes — condensing boilers use \u003cstrong data-start=\"1371\" data-end=\"1424\"\u003elow-temperature PVC\/CPVC or polypropylene venting\u003c\/strong\u003e due to cool exhaust temperatures.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5 data-start=\"1460\" data-end=\"1484\"\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cul data-start=\"1485\" data-end=\"2215\"\u003e\n\u003cli data-start=\"1485\" data-end=\"1638\"\u003e\n\u003cp data-start=\"1487\" data-end=\"1638\"\u003e\u003cstrong data-start=\"1487\" data-end=\"1514\"\u003eAnnual HVAC inspection:\u003c\/strong\u003e Have a licensed technician service the boiler yearly — check heat exchanger, burner, controls, and combustion efficiency.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1639\" data-end=\"1748\"\u003e\n\u003cp data-start=\"1641\" data-end=\"1748\"\u003e\u003cstrong data-start=\"1641\" data-end=\"1668\"\u003eCheck condensate drain:\u003c\/strong\u003e Keep the condensate line clear and flowing to avoid buildup or freeze issues.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1749\" data-end=\"1867\"\u003e\n\u003cp data-start=\"1751\" data-end=\"1867\"\u003e\u003cstrong data-start=\"1751\" data-end=\"1779\"\u003eMonitor system pressure:\u003c\/strong\u003e Maintain proper boiler pressure and make adjustments per the manufacturer’s guidance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1868\" data-end=\"1984\"\u003e\n\u003cp data-start=\"1870\" data-end=\"1984\"\u003e\u003cstrong data-start=\"1870\" data-end=\"1899\"\u003eClean air intake \u0026amp; vents:\u003c\/strong\u003e Remove debris around air inlet and exhaust terminations to ensure safe combustion.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1985\" data-end=\"2087\"\u003e\n\u003cp data-start=\"1987\" data-end=\"2087\"\u003e\u003cstrong data-start=\"1987\" data-end=\"2009\"\u003eInspect for leaks:\u003c\/strong\u003e Periodically check around valves, pumps, and piping for water or gas leaks.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2088\" data-end=\"2215\"\u003e\n\u003cp data-start=\"2090\" data-end=\"2215\"\u003e\u003cstrong data-start=\"2090\" data-end=\"2117\"\u003eMaintain water quality:\u003c\/strong\u003e Use proper inhibitors and periodic flushing to keep the hydronic system clean and corrosion-free.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Weil-McLain","offers":[{"title":"Default Title","offer_id":54162689851676,"sku":"W383500735","price":5008.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/0622\/4924\/files\/Weil-McLain-Ultra-Series-4-155000-BTU-Condensing-Gas-Boiler-Main-Image_24.jpg?v=1780152232","url":"https:\/\/www.mybackyardzone.com\/products\/weil-mclain-ultra-series-4-155000-btu-condensing-gas-boiler","provider":"Backup Power Made Simple","version":"1.0","type":"link"}