US Boiler
U.S. Boiler Company is a manufacturer of residential and commercial heating products, headquartered in Lancaster, PA.
Last updated September 2, 2026
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Overview
U.S. Boiler Company offers residential and commercial heating products designed, engineered, and manufactured domestically. Headquartered in Lancaster, PA, the company employs nearly 300 people. Products include high-efficiency gas and oil boilers, radiators, indirect water heaters, and electric heating products.
History
U.S. Boiler Company is a manufacturer of hydronic-heating products. It has introduced many new high efficiency products over the last several years. The company has invested in manufacturing facilities in Lancaster, Pennsylvania. Cast iron sections are produced by Casting Solutions, another Burnham Holdings subsidiary, in Zanesville, Ohio.
Products and positioning
Alta Boilers and Combis
High efficiency boilers and combis.
Citadel and Citadel XL
High efficiency commercial condensing boilers and water heaters.
ES2 Atmospheric Gas Boiler
The only atmospheric gas boiler made in America, boasting 85% AFUE.
U.S. Boiler IQ Control System
User-friendly boiler control system.
U.S. Boiler Sage2.3 Control System
User-friendly boiler control system.
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