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ASHRAE STD 118.2

Method of Testing for Rating Residential Water Heaters

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Organization: ASHRAE
Publication Date: 21 January 2006
Status: active
Page Count: 18
scope:

This standard applies to the following:

a. gas-fired water heaters with a self-contained, temperatureactivated primary operating control and not requiring circulation of water for heating (Type I), with rated input no greater than 75,000 Btu/h (22 kW);

b. oil-fired water heaters with a self-contained, temperatureactivated primary operating control and not requiring circulation of water for heating (Type I), with rated input no greater than 105,000 Btu/h (30.8 kW);

c. electric resistance water heaters with a primary self-contained, temperature-activated operating control and not requiring circulation of water for heating (Type I), with rated input no greater than 12 kW;

d. gas-fired water heaters with a self-contained, flow-activated primary operating control and requiring water flow for heating (Type II), with rated input no greater than 200,000 Btu/h (58.6 kW);

e. oil-fired water heaters with a self-contained, flow-activated primary operating control and requiring water flow for heating (Type II), with rated input no greater than 210,000 Btu/h (61.5 kW);

f. electric resistance water heaters with a self-contained, flow-activated primary control and requiring water flow for heating (Type II), with rated input no greater than 12 kW;

g. gas-fired water heaters with a remote temperature-activated primary operating control and requiring circulation through the heater for heating (Type III), with rated input no greater than 75,000 Btu/h (22 kW),

h. oil-fired water heaters with a remote temperature-activated primary operating control and requiring circulation of water through the heater for heating (Type III), with rated input no greater than 105,000 Btu/h (30.7 kW);

i. electric resistance water heaters with a remote temperature- activated operating control and requiring circulation through the heater for heating (Type III), with rated input no greater than 12 kW; and

j. single-phase air-source heat-pump water heaters (Types IV and V), with rated input no greater than 6 kW.

PURPOSE

The purpose of this standard is to provide test procedures for rating the efficiency and hot water delivery capabilities of directly heated residential water heaters.

Document History

ASHRAE STD 118.2
January 21, 2006
Method of Testing for Rating Residential Water Heaters
This standard applies to the following: a. gas-fired water heaters with a self-contained, temperatureactivated primary operating control and not requiring circulation of water for heating (Type I),...
January 21, 2006
Method of Testing for Rating Residential Water Heaters
This standard applies to the following: a. gas-fired water heaters with a self-contained, temperature- activated primary operating control and not requiring circulation of water for heating (Type...
January 1, 1993
Method of Testing for Rating Residential Water Heaters
A description is not available for this item.
January 1, 1993
Method of Testing for Rating Residential Water Heaters
A description is not available for this item.

References

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