Hi
Regarding Electric water Heater, is there any equation to calculate the EWH energy factor to compare the result with the equation of ASHRAE 90.1-2007...EFmin = 0.97* − (0.00132 × V).
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5868 thumbs up
March 25, 2019 - 2:45 pm
I'm not sure i understand the question
Osama Touni
1 thumbs up
March 26, 2019 - 1:21 am
The EWH manufacturer cannot provide the EF is there any equation to calculate the EF of the proposed EWH ?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5868 thumbs up
March 26, 2019 - 9:56 am
Thanks for the clarification. Not that I am aware of. I have never heard of a manufacturer that could not provide this information. If they cannot provide it then you cannot attain LEED certification. Meeting the minimum equipment efficiency is a mandatory provision and all LEED projects must meet the mandatory provisions or you cannot earn the prerequisite.