Washington’s 2021 Residential Energy Code went into effect this past March, and it contains some significant changes. You might recall hearing about how the code was going to make the gas furnace a thing of the past. Well, that hasn’t quite happened, though heat pumps have become very attractive from a code compliance perspective. There are also some changes to the prescriptive insulation and window performance requirements, but the final code language didn’t include the most challenging items that were in earlier drafts.
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