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Washington
HVAC companies in Seattle, WA
23 local HVAC companies based within about 25 miles of Seattle, listed A to Z with phone numbers, addresses and services. Paid placements are labeled.
No heat or no cooling right now?
If you smell gas or a carbon monoxide alarm sounds, leave first and call 911 or your gas utility from outside. Otherwise, call a company below that says it takes emergency calls. Quick checks first: AC not cooling · furnace not working.
The list
Seattle HVAC companies, A to Z
Filter by what each business says on its own website. “Says 24/7 emergency” means its site says so – call to confirm before you rely on it.
Your HVAC company, Seattle
The one City Spotlight place for Seattle sits here, above the A to Z list. Requests sent from this page for areas the Spotlight company serves go to it. Offered only to companies that pass our listing rules. How it works
Alexander's Heating & Air Conditioning
Based in Redmond, WA · 14691 NE 95th St., Redmond, WA 98052
Names on its website: Bellevue, Kirkland, Issaquah, Sammamish, Renton, Seattle, Everett, Snoqualmie, North Bend
License number shown on its website: #ALEXAHA824OQ
All Climate Heating & Air Conditioning
Based in Redmond, WA · 14907 NE 95th St, Redmond, WA 98052
Names on its website: Bellevue, Bothell, Burien, Edmonds, Issaquah, Kirkland, Lynnwood, Mercer Island, Renton, Seattle and more
License number shown on its website: ALLCLCH966C6
Ben's Plumbing, Heating & Air
Based in Seattle, WA · 1141 NW 53rd St., Seattle, WA 98107
Names on its website: Ballard, Capitol Hill, Wallingford, Queen Anne, West Seattle, Bellevue, Kirkland, Redmond, Sammamish, Renton and more
License number shown on its website: BENSPP*762OR
Black Lion Heating, Air Conditioning & Electrical
Based in Kirkland, WA · 11001 118th Place NE, Kirkland, WA 98033
Names on its website: Bellevue, Somerset, Newport Hills, Bridle Trails
License number shown on its website: WA State Electrical Contractors License: BLACKLH800NR; WA State General Contractor License: BLACKLH873QQ
Brennan Heating, Air Conditioning, Plumbing & Electrical
Based in Seattle, WA · 4601 134th Pl, Seattle, WA 98168
Names on its website: Bellevue, Bothell, Burien, Kent, Kirkland, Redmond, Renton, Issaquah, Edmonds, Shoreline and more
License number shown on its website: HVAC: BRENNHA971R9
Complete Heating & A/C, Inc.
Based in Renton, WA
Names on its website: Newcastle, Bellevue, Maple Valley, Enumclaw, Des Moines, SeaTac, Kent
License number shown on its website: WA Lic #COMPLHA036J3
Energy Technologies LLC
Based in Seattle, WA · 7311 15th Ave Northwest Unit C-1, Seattle, WA 98117
Essential Heating and Air
Based in Auburn, WA · 1520 14th St NW Unit A, Auburn, WA 98001
Names on its website: Seattle, Tacoma
License number shown on its website: WA Lic. #ESSENML802LZ
Evergreen Home Heating & Energy
Based in Seattle, WA · 727 S. Kenyon St., Seattle, WA 98108
Names on its website: Bellevue, Shoreline
License number shown on its website: EVERGHH910JO
Five Star Mechanical
Based in Everett, WA · 500 SE Everett Mall Way, Everett, WA 98208
Names on its website: Seattle, Tacoma, Bellevue, Lakewood, Olympia
License number shown on its website: WA License #: FIVESM*006C3
Glendale Heating & Air Conditioning
Based in Burien, WA · 12462 Des Moines Memorial Dr S, Burien, WA 98168
Names on its website: Seattle, Des Moines, SeaTac, Tukwila, Normandy Park, Federal Way, Kent, Auburn, Bellevue, Renton and more
License number shown on its website: WA Lic. GLENDHA053Q2
Green City Heating and Air Conditioning
Based in Auburn, WA · 311 3rd St NE, Auburn, WA 98002
Names on its website: Seattle, Tacoma, Bellevue, Kirkland, Issaquah, Kent, Puyallup, Edmonds, Lynnwood
License number shown on its website: #GREENCH866B2
Greenwood Heating and Home Services
Based in Tukwila, WA · 14027 Interurban Ave South, Tukwila, WA 98168
Names on its website: Seattle, Everett
Griffis Heating, Inc.
Based in Auburn, WA
Names on its website: Kent, Federal Way, Covington, Renton, Sumner, Enumclaw, Seattle, Tacoma
License number shown on its website: GRIFFHI088DZ
Home Comfort Alliance
Based in Redmond, WA · 9680 153rd Ave NE, Redmond, WA 98052
Names on its website: Seattle, Tacoma, Everett
HotWire Furnace, Air Conditioning & Appliance Repair
Based in Bothell, WA · 1232 220th Pl SW, Bothell, WA 98021
Names on its website: Seattle, Bellevue, Everett, Tacoma, Kirkland, Redmond, Shoreline
License number shown on its website: General Contractor: HOTWIHR771PR
Kings Heating, Air & Electric
Based in Lynnwood, WA · 18933 Hwy 99, Lynnwood, WA 98036
Names on its website: Bellevue, Snohomish, Medina, Clyde Hill, Duvall, Issaquah, Hunts Point, Edmonds, Mountlake Terrace, Bothell
License number shown on its website: KINGSHI044JA
Miller Mechanical
Based in Everett, WA · 208 78th Pl. SW, Everett, WA 98203
Names on its website: Lynnwood, Bothell, Seattle, Bellevue, Kirkland, Edmonds, Mill Creek, Mukilteo, Shoreline, Renton and more
License number shown on its website: WA License #MILLEML761IOR
Nortech Heating, Cooling & Refrigeration
Based in Seattle, WA
Names on its website: Bellevue, Bothell, Burien, Edmonds, Issaquah, Kent, Kirkland, Lynnwood, Newcastle, Redmond and more
License number shown on its website: NORTEE*851QE
NW Mechanical
Based in Woodinville, WA · 16110 Woodinville Redmond Rd NE Suite #6, Woodinville, WA 98072
Names on its website: Seattle, Bellevue, Bothell, Issaquah, Kirkland, Medina, Mercer Island, Newcastle, Redmond, Sammamish
Overlake Heating & Air Conditioning
Based in Redmond, WA
Names on its website: Bellevue, Bothell, Duvall, Issaquah, Kenmore, Kirkland, Mercer Island, Newcastle, Sammamish, Snoqualmie and more
Pure Air Cooling & Heating
Based in Kirkland, WA · 9720 NE 120th PL, Kirkland, WA 98034
Names on its website: Bellevue, Redmond, Woodinville, Bothell, Brier, Kenmore, Seattle, Shoreline
License number shown on its website: PUREAAC763NR
Universal Refrigeration
Based in Auburn, WA · 4102 B Pl NW, Auburn, WA 98001
Names on its website: Kent, Tacoma, Puyallup, Renton, Federal Way
License number shown on its website: Washington license UBI # 602140981; OR Contractor license # COOLSCI805BP
Details on this page come from each business’s own website, checked October 2026. Free listings are shown alphabetically. How we list · Update or remove a listing
Before you hire
Checking an HVAC company in the Seattle area
HVAC licenses in Washington
HVAC contractors are licensed by the state.
Who licenses: Washington State Department of Labor & Industries (L&I), Contractor Registration
License types: General Contractor Registration, Specialty Contractor Registration.
Companies: Under RCW 18.27.020 every contractor must register with L&I before advertising, bidding or performing work, and L&I confirms specialty contractors can do HVAC work; We did not confirm a separate HVAC-only license, and plumbing and electrical work carry additional licensing.
Local rules: We could not read the WAC 296-200A-016 specialty list or any city rules (fetch limits), so whether HVAC is a named specialty and what local permits apply are unconfirmed.
Check a license: secure.lni.wa.gov
Use L&I's Verify a Contractor, Tradesperson, or Business tool to confirm the contractor is registered, bonded and insured before hiring.
Federal rule: in every state, technicians who handle refrigerant must hold EPA Section 608 certification, whatever the state or city requires.
We could not confirm every detail from Washington’s own sources, so treat this as a starting point and check with the agency.
Sources: lni.wa.gov, app.leg.wa.gov. Checked October 2026 from official sources. This is not legal advice.
Questions to ask
Ask every company the same questions: license number, insurance, EPA refrigerant certification, a written itemized estimate, a load calculation for new equipment, after-hours rates, who pulls the permit, and the warranty. All eight questions.
Seasonal care
Year-round care in Seattle
Seattle homes lean on both heating and cooling, so each system needs a check before its season: cooling in spring, heating in fall.
Questions
Seattle HVAC questions
How many HVAC companies are listed in Seattle?
23 HVAC companies, each based within about 25 miles of Seattle. They are listed alphabetically.
Which Seattle HVAC companies say they offer 24/7 emergency service?
12 of the businesses listed here say on their own website that they offer 24/7 or 24-hour emergency service: Ben’s Plumbing, Heating & Air, Essential Heating and Air, Evergreen Home Heating & Energy, Five Star Mechanical, Greenwood Heating and Home Services, Home Comfort Alliance, Kings Heating, Air & Electric, Miller Mechanical, Nortech Heating, Cooling & Refrigeration, NW Mechanical, Pure Air Cooling & Heating, Universal Refrigeration. Call to confirm availability and after-hours rates.
Do HVAC contractors in Seattle need a license?
Washington licenses HVAC contractors statewide through the Washington State Department of Labor & Industries (L&I), Contractor Registration. Check a license at secure.lni.wa.gov.
Which Seattle companies work on heat pumps?
21 of the listed businesses say on their own website that they install or repair heat pumps. Use the Heat pumps filter above the list.
Which HVAC companies here do commercial work?
12 of the listed businesses say on their own website that they work on commercial properties. Use the Commercial filter above the list.
Do technicians need EPA certification?
Yes: federal rules require technicians who handle refrigerant to hold EPA Section 608 certification, in every state. Ask any company you are considering.
Nearby metro areas: Portland, OR · Boise, ID · Spokane, WA. All of Washington.
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No heat in freezing weather, or no cooling in dangerous heat? Call a company from the list that says it takes emergency calls – a form is not fast enough. If you smell gas or a carbon monoxide alarm sounds, leave first and call 911 or your gas utility from outside.