Best HVAC companies in Mercer Island, WA

The highest-scoring HVAC company in and near Mercer Island is BelRed Heating, Cooling, Plumbing & Electrical (score 90, 4.9 stars from 6,503 Google reviews). 52 companies meet the 5 Star standard within about 16 miles; the top 30 are ranked below.

Last updated Nov 1, 2026How we rank
  1. 1

    BelRed Heating, Cooling, Plumbing & Electrical

    4.9 · 6,503 Google reviewsWoodinville, WA40 years in business

    BelRed Heating, Cooling, Plumbing & Electrical provides residential home services across Seattle, the Eastside, and the Greater Puget Sound. The company has served the Pacific Northwest since 1986 and handles heating,…

    Financing availableEmergency service
    90SCORE
  2. 2

    Greenwood Heating and Home Services

    4.9 · 5,046 Google reviewsTukwila, WA108 years in business

    Greenwood Heating and Home Services serves the Greater Seattle Metro Area with heating, air conditioning, electrical, plumbing, and restoration work. The locally owned, family-owned company has served the Seattle area…

    Emergency service
    90SCORE
  3. 3

    As You Wish Electric, Plumbing, Heating & Air

    4.9 · 3,460 Google reviewsSeattle, WA20 years in business

    As You Wish Electric, Plumbing, Heating & Air provides home comfort services across Seattle and the Greater Puget Sound area. Established by Sean Moncrief in Kirkland in 2006, the company began with electrical work an…

    Financing availableEmergency service
    90SCORE
  4. 4

    Fast Water Heater Company

    4.9 · 2,639 Google reviewsWoodinville, WA40 years in business

    Fast Water Heater Company provides water heater installation, replacement, repair, maintenance, and warranty service across Washington, Oregon, Northern California, and Southern California. The company has served the…

    Financing availableEmergency service
    90SCORE
  5. 5

    2 Sons Plumbing & Sewer

    4.9 · 4,117 Google reviewsSeattle, WA
    83SCORE
  6. 6

    Eco Electric, Plumbing, Heating and Air

    4.9 · 2,490 Google reviewsSeattle, WA

    Eco Electric, Plumbing, Heating and Air provides electrical, plumbing, heating, cooling, and indoor air quality work in Seattle and communities around Puget Sound. Its heating and cooling services cover air conditione…

    Financing availableEmergency service
    82SCORE
  7. 7

    StarDucts

    5.0 · 172 Google reviewsRenton, WA15 years in business

    StarDucts provides residential and commercial duct and vent services in Seattle and surrounding areas. Its cleaning work includes air ducts, dryer vents, roof dryer vents, furnaces, commercial air ducts, and commercia…

    InsuredBondedFamily-ownedFree estimates
    82SCORE
  8. 8

    Pure Air Cooling & Heating

    5.0 · 409 Google reviewsKirkland, WA
    79SCORE
  9. 9

    Pearce Heating & A/C

    5.0 · 393 Google reviewsRedmond, WA
    79SCORE
  10. 10

    South West Plumbing, Heating, Air, & Electric

    4.8 · 11,934 Google reviewsSeattle, WA
    78SCORE
  11. 11

    Gene Johnson Plumbing

    4.8 · 4,904 Google reviewsSeattle, WA
    78SCORE
  12. 12

    Insulation Co

    5.0 · 288 Google reviewsSeattle, WA
    77SCORE
  13. 13

    Fuse Service

    5.0 · 220 Google reviewsKirkland, WA
    77SCORE
  14. 14

    Harts Plumbers, Electricians, & HVAC Technicians

    4.8 · 1,444 Google reviewsTukwila, WA
    76SCORE
  15. 15

    One Hour Heating & Air Conditioning Newcastle

    5.0 · 133 Google reviewsTukwila, WA
    76SCORE
  16. 16

    Prime Systems Heating and Air Conditioning

    5.0 · 143 Google reviewsKirkland, WA
    75SCORE
  17. 17

    Ballard Heating, Cooling, Electric & Plumbing

    5.0 · 113 Google reviewsRedmond, WA
    75SCORE
  18. 18

    Evergreen Home Heating and Energy

    4.8 · 1,013 Google reviewsSeattle, WA
    74SCORE
  19. 19

    Glendale Heating & Air Conditioning

    4.8 · 739 Google reviewsBurien, WA
    74SCORE
  20. 20

    All Climate Heating & Air Conditioning

    4.8 · 723 Google reviewsRedmond, WA
    74SCORE
  21. 21

    Seatown Electric Plumbing Heating and Air

    4.8 · 698 Google reviewsSeattle, WA
    74SCORE
  22. 22

    Washington Water Heaters, Heating & Air Conditioning

    4.9 · 321 Google reviewsRenton, WA
    74SCORE
  23. 23

    Product Air Heating, Cooling, and Electric Seattle

    5.0 · 99 Google reviewsSeattle, WA
    74SCORE
  24. 24

    Agni Heating & Cooling

    5.0 · 86 Google reviewsBellevue, WA
    74SCORE
  25. 25

    Trusted Plumbing & Heating

    4.8 · 473 Google reviewsRenton, WA
    73SCORE
  26. 26

    Tempra HVAC

    5.0 · 83 Google reviewsBellevue, WA
    73SCORE
  27. 27

    A-Service

    5.0 · 75 Google reviewsBellevue, WA
    73SCORE
  28. 28
    72SCORE
  29. 29
    72SCORE
  30. 30

    Green House Plumbing and Heating

    4.8 · 446 Google reviewsKirkland, WA
    71SCORE

We list only companies that clear our published bar, so this area is still filling in. As more HVAC companies near Mercer Island qualify, they'll appear here automatically.

Compare the top 10

Top HVAC companies in Mercer Island by 5 Star Score
#CompanyScoreGoogle ratingReviewsYearsBased in
1BelRed Heating, Cooling, Plumbing & Electrical904.96,50340Woodinville
2Greenwood Heating and Home Services904.95,046108Tukwila
3As You Wish Electric, Plumbing, Heating & Air904.93,46020Seattle
4Fast Water Heater Company904.92,63940Woodinville
52 Sons Plumbing & Sewer834.94,117–Seattle
6Eco Electric, Plumbing, Heating and Air824.92,490–Seattle
7StarDucts825.017215Renton
8Pure Air Cooling & Heating795.0409–Kirkland
9Pearce Heating & A/C795.0393–Redmond
10South West Plumbing, Heating, Air, & Electric784.811,934–Seattle

HVAC companies in Mercer Island: quick answers

Who is the highest-rated HVAC company in Mercer Island, WA?

BelRed Heating, Cooling, Plumbing & Electrical has the highest 5 Star Score among HVAC companies in and near Mercer Island: 90 out of 100, with a 4.9 star Google rating from 6,503 reviews.

How many 5 Star HVAC companies serve Mercer Island?

52 HVAC companies meet our standard within about 16 miles of Mercer Island: at least a 4.5 star rating, 20 or more reviews and a score of 60 or higher. The top 30 have 51,147 Google reviews between them, averaging 4.90 stars.

How are these HVAC companies ranked?

By 5 Star Score: rating quality adjusted for review count (45 points), review volume (25), review recency (15), years in business (10) and license verification (5). Businesses cannot pay to change their score.

HVAC companies near Mercer Island

Other pros in Mercer Island

Search another area

Try a zip code, a nearby city, or a state.

Ratings and review counts come from each company's public Google listing and are re-checked monthly. 5 Star Home Service Pros is independent; companies cannot pay for placement.