U.S. Boiler Company – Our Name Says it All! At U.S. Boiler Company, we are proud to offer American-made residential and commercial heating products that have been designed, engineered and produced domestically. Manufactured in Lancaster, PA, our facilities employ nearly 300 people from our community. Every product that leaves our factory has been designed, engineered and manufactured for exclusive use in North America. That makes us who and what we are… a boiler company that is singularly focused on the needs of our customers.