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This question is about setting the efficiency of the budget case domestic
hot water heater for modelling purposes. In 90.1-2004, Section
11.3.2 (b) is states "<font face="Times New Roman, Times">All HVAC
and service water heating equipment in the <i>budget building </i>shall
be modeled at the minimum <i>efficiency </i>levels, both part load and
full load, in accordance with 6.4 and 7.4. <br><br>
</font>7.4 refers to Table 7.8. A small gas heated storage tank has
an efficiency of 0.62-0.0019V EF. Where EF is the energy
factor. From what I can find there is no single formula to convert
EF to thermal efficiency. So what would you model the budget case
efficiency at in DOE2.1e for this example?<br><br>
Thanks for any insight you can give.<br><br>
<br><br>
<br><br>
<br>
<x-sigsep><p></x-sigsep>
Chris Jones, P.Eng.<br>
14 Oneida Avenue<br>
Toronto, ON M5J2E3<br>
Tel. 416 203-7465<br>
Fax. 416 946-1005</body>
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