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10 Best HVAC Companies in Seattle, WA

The best HVAC companies in Seattle are Evergreen Home Heating and Energy, Go Green Heating AC & Electric, Brennan Heating, Olson Energy Service and Energy Technologies, followed by Progressive Comfort Solutions, Integrity Energy Systems, Eco, Beacon and South West. Evergreen and Olson bring the longest local history, Progressive Comfort Solutions and Eco share the top rating at 4.9 stars, and Beacon and South West answer around the clock with no after-hours fee. All ten hold at least 4.5 stars from 50 or more Google reviews and have an address in Seattle.

  • Last reviewed September 2026
  • 10 companies reviewed · How We Rank

Our top 10 hvac companies in Seattle

Seattle heating and cooling is changing fast. The city's marine climate brings long, damp winters that rarely stay below freezing for long, and for decades most homes got by with an oil or gas furnace and no air conditioning at all. That has shifted. Summer heat waves, including the June 2021 heat dome, pushed many households to add cooling, and a heat pump does both jobs. Seattle City Light's Clean Heat program offers rebates for homes that switch from oil heat to an electric heat pump, and several companies on this list will walk you through it. The housing stock shapes the job. A large share of Seattle's houses are older Craftsman, Tudor and brick homes built before 1940, many with no ductwork, cramped basements and electrical panels too small for new equipment. That is why ductless mini splits are so common here, and why a company that can also handle the electrical work, or plan a multi-zone layout around plaster walls, can save you time and money. Before you hire anyone, look up the company on the Washington State Department of Labor & Industries Verify a Contractor tool to confirm its registration, bond and insurance are active. Most companies here print their license number on their website, and we note where one does not. For heat pump and air conditioning work inside the city, also ask whether the contractor will pull the Seattle mechanical permit and whether it holds a City of Seattle refrigeration license.

  1. Evergreen Home Heating and Energy

    Best overall for heat pump conversions4.8(1008 Google reviews)727 S Kenyon St Ste BBest for Homeowners switching from oil or gas to a heat pump    Rank01

    Why we picked them

    More than 1,000 reviews at 4.8, over 50 years in business, and strong heat pump and rebate experience.

    What we like

    • 1,008 Google reviews at 4.8 stars
    • In business in Seattle since 1975
    • Mitsubishi Electric authorized dealer

    Things to consider

    • Some reviewers found replacement quotes higher than other bids

    Services

    • AC repair
    • AC installation
    • Furnace repair
    • Heat pump installation
    • Duct cleaning
    • Maintenance plans

    Key details

    Best for
    Homeowners switching from oil or gas to a heat pump
    Service area
    Seattle
    Years in business
    51 years
    Warranty
    Covered repairs and installs are backed by manufacturer warranties; the company does not publish its own labor warranty terms, so ask for them in writing.
    Emergency service
    Available
    Financing
    Available
    Credentials
    Washington contractor license EVERGHH910JO

  2. Go Green Heating AC & Electric

    Best for heat pump installs with electrical4.8(230 Google reviews)3218 Eastlake Ave E Ste 1BBest for Ductless and ducted heat pump installs that need new electrical    Rank02

    Why we picked them

    4.8 stars from 230 reviews, published HVAC and electrical licenses, and a crew that handles the wiring a new heat pump needs.

    What we like

    • In-house electricians for panel and circuit work
    • Both license numbers published
    • Strong reviews on Mitsubishi mini split installs

    Things to consider

    • Little review evidence on after-hours repair

    Services

    • AC repair
    • AC installation
    • Furnace repair
    • Heat pump installation
    • Maintenance plans

    Key details

    Best for
    Ductless and ducted heat pump installs that need new electrical
    Service area
    Seattle
    Years in business
    11 years
    Warranty
    Manufacturer warranties apply on installed equipment; ask for labor warranty terms in writing.
    Financing
    Available
    Credentials
    Washington HVAC contractor license GOGREGH752DL

  3. Brennan Heating, Air Conditioning, & Electric

    Most-reviewed HVAC specialist4.5(2242 Google reviews)4601 S 134th PlBest for Homeowners who want a big company with its own install crews    Rank03

    Why we picked them

    The largest review base of any HVAC-focused company here and almost 40 years in business, with the reach to handle heating, cooling and electrical in one job.

    What we like

    • 2,242 Google reviews
    • In business since 1987
    • Licensed for HVAC, electrical and plumbing

    Things to consider

    • Several detailed complaints about install quality and follow-up

    Services

    • AC repair
    • AC installation
    • Furnace repair
    • Heat pump installation
    • Duct cleaning
    • Maintenance plans

    Key details

    Best for
    Homeowners who want a big company with its own install crews
    Service area
    Seattle
    Years in business
    39 years
    Warranty
    Manufacturer equipment warranties apply; ask for Brennan's labor warranty terms in writing before signing.
    Emergency service
    Available
    Financing
    Available
    Credentials
    Washington HVAC contractor license BRENNHA971R9

  4. Olson Energy Service

    Best value on furnace and heat pump bids4.8(377 Google reviews)13190 Stone Ave NBest for Oil and gas furnace owners weighing a heat pump    Rank04

    Why we picked them

    A 4.8 rating from 377 reviews, nearly a century in business, and reviews that repeatedly describe the lowest bid with no sales pressure.

    What we like

    • In business since 1926
    • Bids often below competing quotes
    • No-pressure estimates

    Things to consider

    • No advertised after-hours emergency service

    Services

    • AC repair
    • AC installation
    • Furnace repair
    • Heat pump installation

    Key details

    Best for
    Oil and gas furnace owners weighing a heat pump
    Service area
    Seattle
    Years in business
    100 years
    Warranty
    Manufacturer warranties apply on installed equipment; ask for labor warranty terms in writing.
    Credentials
    Washington license OLSONED863OD

  5. Energy Technologies

    Best small owner-run shop4.7(53 Google reviews)7311 15th Ave NW Unit C-1Best for Ductless heat pumps in Ballard and northwest Seattle    Rank05

    Why we picked them

    A 4.7 rating built over about ten years, Mitsubishi Diamond status, and reviews that single out honest pricing and a hands-on owner.

    What we like

    • Mitsubishi Diamond Contractor
    • Owner involved in each job
    • Repeat customers since 2013

    Things to consider

    • Contractor license number not published on its website

    Services

    • AC repair
    • AC installation
    • Furnace repair
    • Heat pump installation
    • Duct cleaning

    Key details

    Best for
    Ductless heat pumps in Ballard and northwest Seattle
    Service area
    Seattle
    Warranty
    Manufacturer warranties apply, including extended Mitsubishi coverage available through Diamond Contractors; ask for labor terms in writing.
    Emergency service
    Available
    Credentials
    Mitsubishi Diamond Contractor

  6. Progressive Comfort Solutions

    Best for ductless mini splits4.9(164 Google reviews)129 NW 85th St Ste BBest for Complex multi-zone mini split installs in older homes    Rank06

    Why we picked them

    Tied for the best rating on this list, a Mitsubishi Diamond Preferred Contractor, and consistent reviews on complex multi-zone installs.

    What we like

    • 4.9 stars, tied for the top rating here
    • Mitsubishi Diamond Preferred Contractor
    • Warranties up to 12 years on parts and compressors

    Things to consider

    • Not a fit for furnace repair or emergency calls

    Services

    • AC installation
    • Heat pump installation

    Key details

    Best for
    Complex multi-zone mini split installs in older homes
    Service area
    Seattle
    Years in business
    16 years
    Warranty
    As a Mitsubishi Electric Diamond Preferred Contractor it can offer extended factory warranties of up to 12 years on parts and compressors.
    Financing
    Available
    Credentials
    Washington contractor license PROGRCS863J1

  7. Integrity Energy Systems

    Best for whole-home electrification4.7(246 Google reviews)430 S 96th St #9Best for Whole-home electrification with one contractor    Rank07

    Why we picked them

    A 4.7 rating from 246 reviews, published state and city licenses, and the range to handle heat pump, panel and plumbing work in one project.

    What we like

    • HVAC, electrical and plumbing licenses
    • City of Seattle refrigeration license
    • 24/7 emergency service

    Things to consider

    • Repair calls start at a first-hour rate one reviewer put at $289

    Services

    • AC repair
    • AC installation
    • Furnace repair
    • Heat pump installation
    • Maintenance plans

    Key details

    Best for
    Whole-home electrification with one contractor
    Service area
    Seattle
    Years in business
    14 years
    Warranty
    Manufacturer warranties apply on installed equipment; ask for labor warranty terms in writing.
    Emergency service
    Available
    Financing
    Available
    Credentials
    Washington contractor license INTEGES782DZ

  8. Eco Electric, Plumbing, Heating and Air

    Best for fast scheduling4.9(2430 Google reviews)126 S Spokane StBest for Homeowners who want one call for HVAC, plumbing and electrical    Rank08

    Why we picked them

    A 4.9 rating across 2,429 reviews, a published license, upfront pricing and daily phone coverage.

    What we like

    • 2,429 Google reviews at 4.9 stars
    • Upfront pricing guarantee
    • Answers the phone seven days a week

    Things to consider

    • At least one HVAC quote came in far above competitors

    Services

    • AC repair
    • AC installation
    • Furnace repair
    • Heat pump installation
    • Duct cleaning
    • Maintenance plans

    Key details

    Best for
    Homeowners who want one call for HVAC, plumbing and electrical
    Service area
    Seattle
    Years in business
    14 years
    Warranty
    Eco Triple Guarantee covering transparent pricing and satisfaction; manufacturer warranties apply on equipment.
    Emergency service
    Available
    Financing
    Available
    Credentials
    Washington contractor license ECOELEP765P5

  9. Beacon Plumbing, Heating, Electrical & Mechanical

    Best for after-hours emergencies4.6(3498 Google reviews)515 7th Ave SBest for Urgent heating calls at night, on weekends or on holidays    Rank09

    Why we picked them

    More than 3,400 reviews at 4.6 and true 24/7 service with no after-hours fee, which makes it a reliable emergency call.

    What we like

    • 24/7 with no after-hours fee
    • 3,498 Google reviews
    • One-year parts and labor guarantee

    Things to consider

    • Plumbing-first company with thin evidence on HVAC installs

    Services

    • AC repair
    • Furnace repair

    Key details

    Best for
    Urgent heating calls at night, on weekends or on holidays
    Service area
    Seattle
    Years in business
    31 years
    Warranty
    1-year guarantee on parts and labor.
    Emergency service
    Available

  10. South West Plumbing, Heating, Air, & Electric

    Best for West Seattle4.8(11445 Google reviews)7717 Detroit Ave SWBest for West Seattle and White Center homes needing 24/7 service    Rank10

    Why we picked them

    The largest review base on this list at 4.8 stars, a published license and around-the-clock service with no after-hours charge.

    What we like

    • 11,445 Google reviews at 4.8 stars
    • 24/7 with no evening or weekend surcharge
    • In business since 1982

    Things to consider

    • Reviews say little about heat pump installs specifically

    Services

    • AC repair
    • AC installation
    • Furnace repair
    • Maintenance plans

    Key details

    Best for
    West Seattle and White Center homes needing 24/7 service
    Service area
    Seattle
    Years in business
    44 years
    Warranty
    Ask for written warranty terms on equipment and labor; the company does not publish them on its homepage.
    Emergency service
    Available
    Financing
    Available
    Credentials
    Washington contractor license SOUTHWP807OJ

Compare the top hvac companies in Seattle

Ranking position reflects our editorial review, not customer ratings.

Editorial comparison of the 10 ranked companies. Customer ratings, where shown, come from the source named on each company profile.
RankCompanyBest forKey servicesService areaGoogle ratingEmergencyProfile
01Evergreen Home Heating and EnergyHomeowners switching from oil or gas to a heat pumpAC repair, AC installation, Furnace repairSeattle4.8 (1008)YesView →
02Go Green Heating AC & ElectricDuctless and ducted heat pump installs that need new electricalAC repair, AC installation, Furnace repairSeattle4.8 (230)Not listedView →
03Brennan Heating, Air Conditioning, & ElectricHomeowners who want a big company with its own install crewsAC repair, AC installation, Furnace repairSeattle4.5 (2242)YesView →
04Olson Energy ServiceOil and gas furnace owners weighing a heat pumpAC repair, AC installation, Furnace repairSeattle4.8 (377)Not listedView →
05Energy TechnologiesDuctless heat pumps in Ballard and northwest SeattleAC repair, AC installation, Furnace repairSeattle4.7 (53)YesView →
06Progressive Comfort SolutionsComplex multi-zone mini split installs in older homesAC installation, Heat pump installationSeattle4.9 (164)Not listedView →
07Integrity Energy SystemsWhole-home electrification with one contractorAC repair, AC installation, Furnace repairSeattle4.7 (246)YesView →
08Eco Electric, Plumbing, Heating and AirHomeowners who want one call for HVAC, plumbing and electricalAC repair, AC installation, Furnace repairSeattle4.9 (2430)YesView →
09Beacon Plumbing, Heating, Electrical & MechanicalUrgent heating calls at night, on weekends or on holidaysAC repair, Furnace repairSeattle4.6 (3498)YesView →
10South West Plumbing, Heating, Air, & ElectricWest Seattle and White Center homes needing 24/7 serviceAC repair, AC installation, Furnace repairSeattle4.8 (11445)YesView →

HVAC companies serving Seattle and nearby areas

Most companies in this ranking work across Washington and the surrounding suburbs. Coverage and travel fees vary, so confirm your address is inside the service area before scheduling.

  • Seattle
Seattle, Washington

Service coverage across Seattle. Individual company areas are listed on each profile.

How we chose the best hvac companies in Seattle

Read our full ranking methodology →

This list follows Google's order. We searched Google Maps for HVAC contractors in Seattle, WA on September 23, 2026 and kept companies in the order Google returned them, after removing any that did not meet our basic bar: at least 4.5 stars, at least 50 reviews, currently operating, a real website, and an address inside Seattle. We left out companies whose Seattle listing appeared to be a satellite or virtual office for a business based elsewhere, and one whose Google address did not match the offices on its own website. We then read each company's reviews and website to write the profiles. No company paid to be included or to change its position.

How to choose a hvac company in Seattle

  • Verify insurance and credentials

    Ask for a current certificate of insurance and confirm registration or licensing with the authority that issues it, not with the company.

  • Ask for a written estimate

    Scope, materials, removal, disposal and who pulls the permit should all be named on the page rather than agreed on the doorstep.

  • Compare multiple quotes

    Two or three bids on the same scope. A number far below the others usually means something has been left out of it.

  • Understand the warranty

    Separate the manufacturer's warranty on materials from the company's own warranty on the work, and get both in writing.

  • Ask who performs the work

    Find out whether the crew are employees or subcontractors, and who supervises them on the day.

  • Check recent local projects

    Ask for addresses or photographs of comparable jobs finished nearby in the last year or two.

  • Avoid high-pressure sales

    A discount that expires today, or a knock on the door after a storm, is a reason to slow down rather than sign.

  • Get everything in writing

    Change orders, timeline and payment schedule included, before the first payment changes hands.

Questions to ask before hiring

  • Are you insured, and can you send the certificate?
  • How long have you worked in this area?
  • Will you provide a written estimate with materials listed?
  • What warranty do you offer on the work itself?
  • Do you use subcontractors for this job?
  • Who handles permits and inspection?
  • What would you recommend here, and why?
  • How are unexpected costs handled once work starts?
  • What is the estimated timeline from start to finish?
  • Can you provide recent local references?

Red flags

  • No verifiable local business address or registration
  • Pressure to sign on the first visit
  • A demand for full payment up front
  • An offer to cover or waive your insurance deductible
  • Refusal to put warranty terms in writing
  • A quote that will not itemize scope

Related home services in Seattle

HVAC guides for Seattle homeowners

HVAC companies in Seattle FAQs

  • How much does a heat pump cost in Seattle?

    It depends on the house and the system, and none of the companies on this list publish fixed prices. Reviewers describe bids that varied by several thousand dollars for the same job, so get at least two written quotes that list the equipment model numbers, and ask each company whether you qualify for a Seattle City Light rebate.

  • How do I check if a Seattle HVAC contractor is licensed?

    Use the Washington State Department of Labor & Industries Verify a Contractor tool and search by the company name or license number. It shows whether the registration, bond and insurance are active. Most companies on this list print their license number on their website.

  • Which Seattle HVAC companies offer 24/7 emergency service?

    Beacon and South West both answer 24 hours a day with no extra charge for after-hours calls. Evergreen, Brennan, Integrity, Eco and Energy Technologies also advertise emergency or after-hours service. Olson, Go Green and Progressive Comfort Solutions do not advertise 24/7 service.

About this ranking

Originally published
September 2026
Last reviewed
September 2026
Companies evaluated
10

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