Mild marine climate
HVAC services in Washington
Western Washington's mild climate and recent heat waves have made heat pump conversions from oil and gas common.
- ZIP codes covered
- 443
- Cities and towns
- 239
Heating and cooling in Washington
Cool, damp winters and dry summers that have grown hotter. Many homes were built without AC, so heat pumps and ductless systems are a common upgrade.
Washington's Department of Labor & Industries (L&I) registers contractors and licenses electricians, including HVAC/refrigeration specialty electricians. Verify registration through L&I's lookup tool.
Seattle's climate is mild and damp, and many older homes were built with oil furnaces and no AC. After the 2021 heat wave, heat pumps became the standard upgrade, and the state energy code now favors heat pumps for new construction.
Wildfire smoke drifts in during late summer, so a MERV 13 filter and a sealed duct system pay off.
East of the Cascades, Spokane, Yakima and the Tri-Cities have cold winters and hot, dry summers, so AC and cold-climate heat pumps are far more common there than in Seattle.
Most common needs in a mild marine climate
- Heat pump and mini-split installs
- Adding cooling to homes without ducts
- Wildfire-smoke filtration
- Moisture and ventilation
Washington city guides
Local details on housing, utilities and permits.
More covered areas in Washington
Contractors also take calls in these communities, among many others. Check your ZIP above to confirm.
- Yakima · Yakima Co.
- Kent · King Co.
- Bremerton · Kitsap Co.
- Renton · King Co.
- Puyallup · Pierce Co.
- Federal Way · King Co.
- Auburn · King Co.
- Bothell · King Co.
- Lynnwood · Snohomish Co.
- Kennewick · Benton Co.
- Bellingham · Whatcom Co.
- Kirkland · King Co.
- Redmond · King Co.
- Lakewood · Pierce Co.
- Gig Harbor · Pierce Co.
- Snohomish · Snohomish Co.
- Marysville · Snohomish Co.
- Pasco · Franklin Co.
- Mount Vernon · Skagit Co.
- Sammamish · King Co.
- Richland · Benton Co.
- Lacey · Thurston Co.
- Edmonds · Snohomish Co.
- Issaquah · King Co.
- Silverdale · Kitsap Co.
- Port Orchard · Kitsap Co.
- Woodinville · King Co.
- Sumner · Pierce Co.
- Greenacres · Spokane Co.
- Veradale · Spokane Co.
- Longview · Cowlitz Co.
- Seahurst · King Co.
- Lake Stevens · Snohomish Co.
HVAC services available in Washington
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