Commercial Water Heaters
Certification Program

Find Commercial Water Heaters in the AHRI Directory.


Resources

CWH DS-1: Data Sheet
CWH-WT1: Application for Witness Testing Form
CWH-WT2: Personnel Experience Questionnaire Form
CWH-WT3: Facility and Equipment Questionnaire Form
Product-Specific Operations Manual
General Operations Manual


Program Scope
  • All commercial electric, gas, and oil water heaters which have input ratings of 500,000 Btu/h or less and which have energy input ratings and capacity within the parameters outlined below are included in the program.
  • Electric storage water heaters with energy input ratings greater than 12 kilowatts or with storage capacity greater than 120 gallons
  • Electric instantaneous water heaters with energy input ratings greater than 12 kilowatts
  • Gas storage water heaters with energy input ratings greater than 75,000 Btu/h or storage capacities greater than 100 gallons
  • Gas instantaneous water heaters with energy input of 200,000 Btu/h or greater, or designed to deliver water at a controlled temperature greater than 180ºF (82.2ºC) or with a storage capacity of 2 gallons or more
  • Oil storage water heaters with energy input greater than 105,000 Btu/h or storage capacities greater than 50 gallons
This program independently verifies:

Efficiency: Thermal Efficiency (ET)

  • Standby Loss , %/hr or btuh