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2018 Energy Credit Changes (WA)


Registered User
Dec 30, 2020
Washington State, USA
The new energy credits in the (Washington) energy code (table 406.3) seem to exclude the use of the old style electric water heaters in new R-3 construction. Rather, it seems that heat-pump style water heating is now required where electricity is the fuel type, when applied to new home construction over 1500sf.

Are tank-less, electric-powered water heating systems no longer allowed?
When are standard electric, non-heat pump tank-type water heaters allowed now in R-3 new home construction over 1500sf?

If I'm reading the options correctly the only time they are allowed now is when they are gas-fired, either NG or propane?