scope:

This standard provides test procedures for determining the efficiency and hot-water delivery capability of the waterheating equipment to which it applies.

This standard applies to electric resistance, heat pump, gas-fired, and oil-fired water-heating equipment, including hot-water supply boilers,

This standard does not apply to gas-fired service waterheating equipment that

a. has a storage capacity of less than two gallons,

b. is designated to deliver water at a controlled temperature of less than 180°F (82°C), and

c. has an input rating less than 200,000 Btu/h (59 kW).

PURPOSE

The purpose of this standard is to provide test procedures for rating directly heated commercial-service water-heating equipment.