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Commercial Water Heaters (CWH)

Resources

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 and less than 4,000 Btu/h per gallon of stored water.
  • Gas storage water heaters with energy input ratings greater than 75,000 Btu/h or storage capacities greater than 100 gallons and less than 4,000 Btu/h per gallon of stored water.
  • Gas instantaneous water heaters with energy input of 200,000 Btu/h or greater, and not less than 4,000 Btu/h per gallon of stored water.
  • Oil storage water heaters with energy input greater than 105,000 Btu/h.

Certified Ratings

The following certification program ratings are verified by test:

  • Thermal Efficiency, %
  • Standby Loss, %/h or btu/h

Certification Program

Find AHRI Certified® Commercial Water Heaters

The rules and procedures for obtaining and maintaining certification are detailed in the Resources section above. The specific Standard listed above details the technical requirements for rating and publishing your product performance, the AHRI General Operations Manual (OM) details the program operational rules that are generic to all of AHRI’s certification programs and lastly, the Product-specific Operations Manual provides the operational rules that are specific to this program along with the required documents and fees. Please ensure that you are familiar with the latest rules and procedures for this program.