564 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Mercer Island: Greenwood Heating and Home Services, CR Score 66/100; 4.9★ from 4,152 Google reviews; open 24/7.
Best for emergencies (open 24/7): AAA Heating & Air Conditioning, posts 24/7 hours; ranked #2 of 564.
Most-reviewed: Seatown Electric Plumbing Heating and Air, 6,184 Google reviews at 4.8★, the most of 564 ranked; ranked #17.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
564 Mercer Island HVAC contractors are ranked here by CR Score, from ten published factors. 139 are open 24/7, 340 open Saturdays and 284 open Sundays, based on posted hours. The median Google rating is 4.9★ across 564 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Greenwood Heating and Home Services | 66 | 4.9★ (4,152) | Tukwila, 7 mi away | 24/7 | Overall |
| 2 | AAA Heating & Air Conditioning | 66 | 4.9★ (4,668) | Renton, 9 mi away | 24/7 | Emergencies |
| 3 | South West Plumbing, Heating, Air, & Electric | 65 | 5.0★ (895) | Seattle, 5 mi away | 24/7 | — |
| 4 | Gene Johnson Plumbing | 64 | 4.8★ (4,041) | Seattle, 11 mi away | 24/7 | — |
| 5 | South West Plumbing, Heating, Air, & Electric | 64 | 4.6★ (5,204) | Renton, 9 mi away | 24/7 | — |
| 6 | Fox Plumbing, Heating & Cooling (now a Gene Johnson company) | 63 | 4.8★ (2,264) | SeaTac, 11 mi away | 24/7 | — |
| 7 | Beacon Plumbing, Heating, Electrical & Mechanical Inc - Seattle | 63 | 4.5★ (2,956) | Seattle, 5 mi away | 24/7 | — |
| 8 | Harts Plumbers, Electricians, & HVAC Technicians | 63 | 4.8★ (1,009) | Tukwila, 8 mi away | 24/7 | — |
| 9 | Beacon Plumbing, Heating, Electrical & Mechanical Inc - Kent | 62 | 4.7★ (1,362) | Kent, 10 mi away | 24/7 | — |
| 10 | All Climate Heating & Air Conditioning | 62 | 4.8★ (675) | Redmond, 9 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and trade focus: 4.9★ from 4,152 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Renton, 9 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 4,668 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Seattle, 5 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 895 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Seattle, 11 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 4,041 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Renton, 9 mi away
Ranked #5 because of its Google rating and trade focus: 4.6★ from 5,204 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in SeaTac, 11 mi away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 2,264 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Seattle, 5 mi away
Ranked #7 because of its Google rating and trade focus: 4.5★ from 2,956 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Tukwila, 8 mi away
Ranked #8 because of its Google rating and trade focus: 4.8★ from 1,009 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Kent, 10 mi away
Ranked #9 because of its Google rating and trade focus: 4.7★ from 1,362 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Redmond, 9 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 675 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bellevue, 2 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 134 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bothell, 16 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 1,238 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lynnwood, 17 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 1,457 Google reviews, listed on Google as “Heating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bellevue, 3 mi away
Ranked #14 because of its Google rating and trade focus: 4.7★ from 255 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Woodinville, 14 mi away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 5,444 Google reviews, listed on Google as “HVAC contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Auburn, 19 mi away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 2,274 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Mukilteo, 25 mi away
Ranked #17 because of its Google rating and review volume: 4.8★ from 6,184 Google reviews, the most in Mercer Island.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Tacoma, 22 mi away
Ranked #18 because of its Google rating and trade focus: 4.8★ from 3,524 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Kent, 15 mi away
Ranked #19 because of its Google rating and trade focus: 4.5★ from 2,749 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lynnwood, 17 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 823 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Seattle, 10 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 183 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lynnwood, 19 mi away
Ranked #22 because of its Google rating and trade focus: 4.8★ from 1,639 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Burien, 7 mi away
Ranked #23 because of its Google rating and trade focus: 4.4★ from 942 Google reviews, listed on Google as “Heating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bellevue, 3 mi away
Ranked #24 because of its Google rating and trade focus: 4.7★ from 132 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Kirkland, 10 mi away
Ranked #25 because of its Google rating and trade focus: 4.7★ from 454 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 564 ranked HVAC contractors here; the rest are on their profiles.
20 more HVAC contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| 2 Sons Plumbing, Sewer, Heating & Air | 4.8★ (337) | 21 mi |
| 5 Star Heating and Air | 5.0★ (2) | 14 mi |
| CoolVantage Systems | In Mercer Island | |
| Epic Air Heating & Cooling, LLC | 5.0★ (2) | 14 mi |
| Genesee Heating Co | 2.5★ (2) | 6 mi |
| GFR Heating & Cooling | 5.0★ (2) | 13 mi |
| Griffis Heating Inc. | 4.9★ (178) | 17 mi |
| Heattransfer HVAC | 3.0★ (2) | 14 mi |
| Lakeside Plumbing & Heating | 3.5★ (2) | 13 mi |
| Mark’s Mini Splits | 5.0★ (32) | 3 mi |
| Meli Mechanical Solutions | 5.0★ (2) | 14 mi |
| Northwood Heating & Air Inc | 3.5★ (2) | 14 mi |
| Prime Systems Heating and Air Conditioning | 5.0★ (113) | 18 mi |
| Seattle Air Superior | 4.8★ (84) | 7 mi |
| Seattle Heating & Cooling | 4.8★ (65) | 9 mi |
| Skyline Heating & Cooling | 4.9★ (55) | 13 mi |
| Superheat Heating and Cooling | 5.0★ (2) | 12 mi |
| System Incorporated | 4.0★ (2) | 5 mi |
| Vincent Heating & Cooling Company | 5.0★ (2) | 7 mi |
| Zeppelin Enterprises, LLC. | 5.0★ (2) | 13 mi |
National price ranges in USD, not adjusted for Mercer Island. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| AC replacement | $3,887 | $5,978 | $8,073 | Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
| Furnace replacement | $2,823 | $4,814 | $6,896 | Per system, installed; typical range of customer-reported jobs. US national range | October 2026 |
Washington's HVAC demand peaks during summer heat waves and the first cold snaps. Spring and fall are the easiest times to book maintenance.
We scored 564 Mercer Island HVAC contractors on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 23, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Mercer Island data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |