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Regulatory Language for State Equipment Standards
”Commercial water heater” means a product which utilizes oil, gas or electricity to heat potable water for use outside the heater upon demand, including
- “Electric storage water heater” means a water heater that uses electricity as the energy source, has a nominal input greater than 12 kilowatts, and/or has a rated storage capacity greater than 120 gallons.
- “Gas storage water heater” means a water heater than uses gas as the energy source, has a nominal input of greater than 75,000 Btu per hour, and/or has a rated storage capacity greater than 100 gallons.
- “Oil storage water heater” means a water heater than uses oil as the energy source, has a nominal input greater than 105,000 Btu per hour, and/or has a rated storage capacity greater than 50 gallons.
- “Gas instantaneous water heater” means a water heater that uses gas as the energy source, is designed to deliver water at a controlled temperature of less than 180F, has an input greater than 200,000 Btu per hour, and an input rating of at least 4,000 Btu per hour per gallon of stored water,
- “Oil instantaneous water heater” means a water heater than uses oil as the energy source, has an input greater than 210,000 Btu per hour, and an input rating of at least 4,000 Btu per hour per gallon of stored water.
The minimum efficiency standards for commercial water heaters shall be the levels set forth in the table below determined in accordance with the test procedures set forth in ANSI Z21.10.3[-2001] (see section 506.6 of this Part) with the following modification to the Method of Test for STANDBY LOSS described in section 2.10: the duration of the test shall be the shorter of either 1) until the first cutout following 24 hours from the initiation of data collection or 2) until 48 hours from the initiation of data collection if the water heater is not in the heating mode at that time.
Minimum Energy Efficiency Standards:
Thermal Efficiency and Standby Losses for Commercial Water Heaters |
Electric Storage Water Heater |
Maximum Standby Loss: 0.3 + 27/V |
Gas-fired Storage Water Heater |
Minimum Thermal Efficiency 80% Maximum Standby Loss: Q/800+110(sqrtVr) |
Oil Storage Water Heater |
Minimum Thermal Efficiency 78% Maximum Standby Loss: Q/800+110(sqrtVr) |
Gas Instantaneous Water Heater |
Storage Capacity: ( Volume < 10 gallons) |
Minimum Thermal Efficiency 80% |
Storage Capacity: ( Volume >= 10 gallons) |
Minimum Thermal Efficiency 80% Q/800+110(sqrtVr) |
Oil Instantaneous Water Heater |
Size: ( Volume < 10 gallons) |
Minimum Thermal Efficiency 80% |
Minimum Thermal Efficiency 80% |
Minimum Thermal Efficiency 78% Maximum Standby Loss: Q/800+100(sqrtVr) |
Product Listings
GAMA: An Association of Appliance and Equipment Manufacturers
Commercial Water Heating Equipment Product List
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