Viessmann CI2-500

Viessmann CI2-500 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 2452869, certified 2023-03-29). EPA publishes these rated values for the listing: Full load input rate Btu hr 500; Reported thermal efficiency TE 97.90; 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.