Vancouver Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 4C (marine Pacific Northwest). Vancouver WA's Columbia Gorge position is warmer than Seattle or Tacoma — 89°F cooling design and 22°F heating design. Slightly hotter summers than north Puget Sound; Gorge wind events can bring cold air in winter.

Energy Code & Manual J Requirement: Washington Energy Code (IECC 2021, Washington modified). ACCA Manual J required for residential HVAC permits in Clark County and all Vancouver WA jurisdictions.

Local Electric Utility: Clark Public Utilities

Building Department: City of Vancouver Community Development Department

Local Trade Association: ACCA Northwest Chapter