U.S. Boiler Company CTD650C

U.S. Boiler Company CTD650C appears in the U.S. EPA ENERGY STAR "Certified Commercial Boilers" dataset, which lists products whose manufacturers have certified them to the program's specification (record 4682280, certified 2026-08-04). EPA publishes these rated values for the listing: Full load input rate Btu hr 650; Reported thermal efficiency TE 97.00; Turndown ratio 10.00; Control type Multi-stage; Application Indoor. The listing records ENERGY STAR certification and the rated values the manufacturer reported to EPA. It is not a determination that any building, installation or design complies with a code.