{"product_id":"viessmann-cu3a-94-vitocrossal-300-cu3a-94-000-btu-gas-condensing-boiler","title":"Viessmann CU3A-94 Vitocrossal 300 CU3A 94,000 BTU Gas Condensing Boiler","description":"\u003ch2\u003eUpgrade to the Viessmann CU3A-94 Vitocrossal 300 Gas Condensing Boiler\u003c\/h2\u003e\n\u003cp\u003eThe Viessmann CU3A-94 Vitocrossal 300 is a high-efficiency, floor-standing gas condensing boiler designed for residential and light commercial heating systems that demand consistent performance, low operating costs, and long-term reliability.\u003c\/p\u003e\n\u003cp\u003eBuilt around Viessmann’s proven Inox-Crossal stainless steel heat exchanger and MatriX dome gas burner technology, this boiler delivers exceptional fuel efficiency, quiet operation, and stable heating output for both retrofit and new construction applications.\u003c\/p\u003e\n\u003cp\u003eWith a maximum input of 94,000 BTU and 95% AFUE efficiency, the CU3A-94 is ideal for high-temperature systems such as cast iron radiators, baseboard heating loops, and multi-zone hydronic systems.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003ch4\u003eExceptional Efficiency with Intelligent Technology\u003c\/h4\u003e\n\u003cp\u003eAchieve up to 98% efficiency with the vertical stainless steel Inox-Crossal heat exchanger, designed for optimal heat transfer. Its smooth surface promotes a self-cleaning effect, pushing efficiency even further while reducing maintenance needs. Paired with the MatriX dome gas burner, the boiler ensures ultra-low emissions and high-performance combustion, even with fluctuating gas quality.\u003c\/p\u003e\n\u003ch4\u003eFlexible and Reliable for All Homes\u003c\/h4\u003e\n\u003cp\u003eWhether your home relies on high-mass cast iron radiators or modern high-temperature fin tube radiators, the Viessmann CU3A seamlessly integrates with all setups. Its high-output capacity and compact floor-standing design make it a versatile choice for virtually any heating demand, including multi-zone systems and significant hot water requirements.\u003c\/p\u003e\n\u003ch4\u003eQuiet Comfort and Durability\u003c\/h4\u003e\n\u003cp\u003eOperating quieter than most household refrigerators, the CU3A ensures absolute comfort without distracting noise. Its durable stainless steel construction and limited lifetime warranty on residential applications provide peace of mind, knowing your investment will stand the test of time.\u003c\/p\u003e\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-efficiency residential\/light commercial gas condensing boiler\u003c\/li\u003e\n\u003cli\u003eMaximum input: 94,000 BTU\u003c\/li\u003e\n\u003cli\u003eAFUE efficiency: up to 95%\u003c\/li\u003e\n\u003cli\u003eFloor-standing installation design\u003c\/li\u003e\n\u003cli\u003eStainless steel Inox-Crossal heat exchanger\u003c\/li\u003e\n\u003cli\u003eMatriX dome modulating burner system\u003c\/li\u003e\n\u003cli\u003e5:1 turndown ratio for efficient part-load operation\u003c\/li\u003e\n\u003cli\u003eSuitable for hydronic heating systems (radiators, baseboard, multi-zone systems)\u003c\/li\u003e\n\u003cli\u003eCompact footprint for retrofit mechanical rooms\u003c\/li\u003e\n\u003cli\u003eDesigned for consistent heating performance with reduced cycling\u003c\/li\u003e\n\u003cli\u003eHigh-altitude operation capability (up to approx. 10,000 ft)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/plumbing-deals.com\/collections\/viessmann\" title=\"Shop all Viessmann products on Plumbing Deals\"\u003eViessmann\u003c\/a\u003e is a global leader in high-efficiency heating systems, known for durable engineering, advanced condensing technology, and long-lasting hydronic boiler solutions designed for residential and commercial applications.\u003c\/p\u003e\n\u003ch3\u003eAdditional Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel: \u003c\/strong\u003eCU3A-94\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand: \u003c\/strong\u003eViessmann\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries: \u003c\/strong\u003eVitocrossal 300 CU3A\u003c\/li\u003e\n\u003cli\u003e\n\u003c!--[endif]--\u003e\u003cstrong\u003eWarranty: \u003c\/strong\u003eLimited lifetime warranty in residential applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eViessmann CU3A-94 FAQ\u003c\/h3\u003e\n\u003ch4\u003eWhat is the Viessmann CU3A-94 used for?\u003c\/h4\u003e\n\u003cp\u003eThe CU3A-94 is a high-efficiency condensing boiler used for residential and light commercial hydronic heating systems, including radiators, baseboards, and multi-zone heating setups.\u003c\/p\u003e\n\u003ch4\u003eIs the CU3A-94 good for replacing older cast iron boilers?\u003c\/h4\u003e\n\u003cp\u003eYes. The CU3A-94 is specifically designed for retrofit applications and performs well in high-temperature systems like cast iron radiators.\u003c\/p\u003e\n\u003ch4\u003eHow efficient is the Viessmann CU3A-94 boiler?\u003c\/h4\u003e\n\u003cp\u003eIt operates at up to 95% AFUE efficiency, depending on system configuration and operating conditions.\u003c\/p\u003e\n\u003ch4\u003eDoes the CU3A-94 require special piping?\u003c\/h4\u003e\n\u003cp\u003eIn many applications, its high water content design reduces or eliminates the need for complex primary\/secondary piping.\u003c\/p\u003e\n\u003ch4\u003eWhat makes this boiler a condensing model?\u003c\/h4\u003e\n\u003cp\u003eIt captures additional heat from flue gases using a stainless steel heat exchanger, increasing efficiency compared to non-condensing boilers.\u003c\/p\u003e","brand":"Viessmann","offers":[{"title":"Default Title","offer_id":43932323545139,"sku":"VIESCU3A94","price":6556.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/5964\/8563\/files\/Vitocrossal-300-CU3A_Front_1280x1280_transparent_627d114e-eed2-43ce-a9a0-36e03fc5e3b2.png?v=1769700675","url":"https:\/\/plumbing-deals.com\/products\/viessmann-cu3a-94-vitocrossal-300-cu3a-94-000-btu-gas-condensing-boiler","provider":"Plumbing Deals","version":"1.0","type":"link"}