U.S. Boiler Company CTD1500C-O

U.S. Boiler Company CTD1500C-O 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 4682277, certified 2026-08-04). EPA publishes these rated values for the listing: Full load input rate Btu hr 1500; Reported thermal efficiency TE 96.00; Turndown ratio 10.00; Control type Multi-stage; Application Outdoor. 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.