Portland Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 4C (marine). Portland's marine climate has mild, wet winters (21°F heating design) and warm, dry summers (89°F/68°F cooling design). Heat pump adoption has accelerated significantly following the 2021 heat dome.

Energy Code & Manual J Requirement: Oregon Residential Specialty Code (ORSC) — one of the most progressive energy codes in the US. Strong heat pump requirements. ACCA Manual J required for all Portland metro HVAC permit applications.

Local Electric Utility: Portland General Electric (PGE)

Building Department: City of Portland Bureau of Development Services (BDS)

Local Trade Association: PHCC Oregon / ASHRAE Oregon Chapter / SMACNA Oregon