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ASHRAE Standard Project Committee 118.2
Method of Testing for Rating Residential Water Heaters
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Welcome to the website of ASHRAE Standard Project Committee 118.2
Committee Title, Purpose and Scope
- TITLE: Method of Testing for Rating Residential Water Heaters
- PURPOSE: The purpose of this standard is to provide test procedures for rating the efficiency and hot water delivery capabilities od directly heated residential water heaters.
- SCOPE: 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 I), with rated input no greater than 75,000 Btu/h (22 kW);
b. oil-fired water heaters with a self-contained, temperature-activated primary operating control and not requiring cir
culation 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 200,000Btu/h (61.5 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.
Proposed standard authorized 6/2010
Current Guideline Draft
as of the adjournment is available to SPC 118.2 members after logging in to the Members Only section.
Current Activities
as of January 2008
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Work continues on the front matter and the use cases.
Contact Information
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Upcoming Meeting:
2009 ASHRAE Annual Meeting Louisville, KY, USA, June 20-24, 2009
The next face-to-face meeting of SPC 118.2 is scheduled for Tuesday, June 23, 2009 in
Louisville at the ASHRAE Summer Meeting at the
Palmer House Hilton, from 10:15 a.m. to 12:15 p.m.
The theme for the conference is "Sustainable Urban Design: Engineering Tomorrow...Today"
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