Weil McLain
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About Weil McLain
Weil-McLain is the largest boiler brand in North America by volume. Founded in 1881 as Weil Brothers in Chicago, the company rebranded to Weil-McLain in 1918 after acquiring J.H. McLain Company. Now headquartered in Burr Ridge, Illinois with manufacturing in Michigan City, Indiana and Eden, North Carolina, Weil-McLain has been building boilers for over 140 years.
The product lineup centers on hydronic heating - cast iron boilers, condensing boilers, combi-boilers, and indirect-fired water heaters for residential and commercial applications. Weil-McLain operates its own cast iron foundry in Michigan City alongside state-of-the-art testing laboratories. The company is owned by SPX Technologies and acquired Williamson Thermoflo (oil furnaces) in 1999.
For homes with hydronic (boiler-based) heating systems, Weil-McLain is the default choice contractors reach for. High-efficiency condensing models qualify for federal tax credits, and upgrading from an older cast iron boiler to a modern condensing unit can cut heating fuel consumption by 15-30%. Weil-McLain's scale means parts availability and contractor familiarity are rarely an issue.
UniColorado Heating & Cooling serves Denver homeowners with expert heat pump installations, delivering efficient climate control across Littleton, Aurora, Boulder, and the Front Range.
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What This Means for Your Tax Return
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Heat pumps meeting efficiency requirements qualify for the highest credit amount
Equipment must meet efficiency requirements
The 25C Energy Efficient Home Improvement Credit requires specific SEER2/EER2/HSPF2 ratings
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