Why does Seattle prefer heat pumps for heating and hot water?
Answered by AskBaily Editorial · Updated
Short answer
The 2021 Seattle Energy Code structurally advantages heat pumps. Electric resistance heat is effectively banned as a primary heating source in most new residential construction. Gas furnaces and gas water heaters remain legal but face escalating code disadvantages; heat pumps are the default path to compliance. Substantial renovations often trigger the requirement to upgrade primary heating to a heat pump.
In detail
The 2021 Seattle Energy Code structurally advantages heat pumps. Electric resistance heat is effectively banned as a primary heating source in most new residential construction. Gas furnaces and gas water heaters remain legal but face escalating code disadvantages; heat pumps are the default path to compliance. Substantial renovations often trigger the requirement to upgrade primary heating to a heat pump.
This answer is part of AskBaily's seattle regulatory knowledge base. For deeper context — including current code-section references, agency contact details, and recent policy changes — see the [seattle city hub](/seattle) or [the /ask hub](/ask) for related questions.
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