A revised Commercial Instantaneous Water Heaters and Hot Water Supply Boilers, v5.2 template has been posted on the CCMS web site. For residential-duty commercial water heaters, this template must be used to certify compliance with the energy conservation standards for Uniform Energy Factor (UEF) based on testing or an AEDM. This template must also be used for residential-duty commercial water heater certification reports submitted beginning December 30, 2017. If a manufacturer has previously certified a UEF that was determined through testing or an AEDM, it is not necessary to resubmit the model until the May 1, 2018 annual certification date as long as the rating remains valid.

For all other commercial instantaneous water heaters and hot water supply boilers, this template must be used for all certifications submitted on or after December 30, 2017.