The Best HVAC Contractors in California
We graded 10 companies on seven things customers actually report: satisfaction, reliability, workmanship, value, momentum, track record and how owners handle complaints.
From 117,533 Google reviews of 113 top-rated HVAC contractors nationwide; 10 of them in California. Updated November 1, 2026.
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Best HVAC contractors in California for plumbing leak detection
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United HVAC, Plumbing & ElectricalHow Job match is calculatedBuilt only from reviews Google tagged “Plumbing leak detection”:Stars on this job 55%5.00★Number of such jobs 25%59Overall Experts Score 20%95Job match= 98Stars are pulled toward the category average (4.90★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.98
United HVAC, Plumbing & ElectricalHow Job match is calculatedBuilt only from reviews Google tagged “Plumbing leak detection”:Stars on this job 55%5.00★Number of such jobs 25%3Overall Experts Score 20%96Job match= 77Stars are pulled toward the category average (4.90★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.77
Fuse HVAC, Refrigeration, Electrical & PlumbingHow Job match is calculatedBuilt only from reviews Google tagged “Plumbing leak detection”:Stars on this job 55%4.86★Number of such jobs 25%7Overall Experts Score 20%84Job match= 75Stars are pulled toward the category average (4.90★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.75Job match = this company’s ★ on reviews Google tagged “Plumbing leak detection” (shrunk toward the category average when there are few), how many such jobs it has done, and its overall Experts Score.
What customers said about plumbing leak detection
United HVAC, Plumbing & ElectricalI had a great experience with Cristopher Villa. He did an excellent job redoing the plumbing underneath my kitchen sink and making sure everything was properly connected and working as it should. He also snaked the kitchen drain line to address a recurring blockage. Cristopher was professional, knowledgeable, and…
Fuse HVAC, Refrigeration, Electri…I got great service from Fuse. I needed to install a Tesla charger and replace some old leaking and corroded pipes. Juslav came in and did a fabulous job installing the charger. During the work, he got stung by a yellow jacket from a hidden hive under the electric panel but he powered through it and completed the…
United HVAC, Plumbing & ElectricalThey were on time, found the issue, fixed it and patched the holes as promised. I will call them the next time I need a plumber.
United HVAC, Plumbing & ElectricalWe’ve had Anton help us with several plumbing projects around the house, and every experience has been great. Most recently, he replaced our washer/dryer valves, installed a new toilet, and took care of a leaking bathtub faucet. What I really appreciate about Anton is that he takes the time to explain what’s going…
United HVAC, Plumbing & ElectricalGreat thanks to Pasha and Anton and Teo! They helped us to finish couple of big projects after home purchase and before moving in. 1. install a water softner (Aquasure) 2. HVAC Team to replace the old HVAC system and install a new one for the whole house. 3. Water leak selection installation for the house. They have…
Fuse HVAC, Refrigeration, Electri…Prompt arrival, clearly explained the plumbing issue and the fix. Finished the work on time. Price was reasonable.
Overall ratings
Experts Score 0–100Experts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. and a letter grade per factor (A = top 20% of HVAC contractors).
| # | Company | ScoreExperts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. | FactorsFactor grades, in orderSatisfaction (54%): Recency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.Reliability (24%): How rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.Craft & service (0%): Google review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.Value (14%): Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Momentum (0%): Penalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.Replies to reviews (7%): How often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.One letter per factor score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = below 20. | ★Google star rating as shown on Google Maps. | Typical billMedian bill customers of this company reported in their reviews (needs 3+ priced reviews). |
|---|---|---|---|---|---|
| 1 |  Promax Service GroupSunnyvale, CA | A 100How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 59%100+58.7Reliability 26%99+25.8Value 15%100+15.2Experts Score= 100Not enough data for replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA–AA– | 5.00 | $1.2k |
| 2 |  Nur HVACSunnyvale, CA | A 96How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%96+52.4Reliability 24%98+23.8Value 14%100+14.1Replies to reviews 7%81+5.7Experts Score= 96Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.95 | $1.1k |
| 3 | United HVAC, Plumbing & ElectricalSunnyvale, CA | A 96How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 59%98+57.5Reliability 26%97+25.3Value 15%90+13.7Craft & service penalty99−0.1Experts Score= 96Not enough data for replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAA– | 4.98 | $549 |
| 4 |  Your Appliance, Refrigeration & HVAC repairSunnyvale, CA | A 96How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%96+52.4Reliability 24%99+24Value 14%95+13.4Replies to reviews 7%85+6Experts Score= 96Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA–AAA | 4.96 | $287 |
| 5 | United HVAC, Plumbing & ElectricalSunnyvale, CA | A 95How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%94+51.3Reliability 24%95+23Value 14%100+14.1Replies to reviews 7%100+7.1Craft & service penalty98−0.2Experts Score= 95Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.94 | $824 |
| 6 |  Made Simple Heating And AirSunnyvale, CA | A 95How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%94+51.3Reliability 24%93+22.5Value 14%100+14.1Replies to reviews 7%100+7.1Craft & service penalty99−0.1Experts Score= 95Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.95 | $1.2k |
| 7 |  United HVAC, Plumbing & ElectricalSunnyvale, CA | A 88How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%89+48.5Reliability 24%89+21.6Value 14%81+11.5Replies to reviews 7%84+5.9Experts Score= 88Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA–AAA | 4.90 | $460 |
| 8 | Fuse HVAC, Refrigeration, Electrical & PlumbingSan Jose, CA | A 84How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%85+46.4Reliability 24%83+20.1Value 14%100+14.1Replies to reviews 7%62+4.4Craft & service penalty85−1.5Experts Score= 84Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAB | 4.85 | $1.2k |
| 9 |  All HVAC & General ConstructionSunnyvale, CA | B 71How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%78+42.5Reliability 24%59+14.3Value 14%100+14.1Replies to reviews 7%92+6.5Craft & service penalty35−6.5Experts Score= 71Grade B: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | BCDAAA | 4.75 | — |
| 10 |  Same Day Air Conditioning & HeatingSunnyvale, CA | B 63How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%72+39.3Reliability 24%65+15.8Value 14%87+12.3Replies to reviews 7%22+1.6Craft & service penalty46−5.4Experts Score= 63Grade B: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | BBCAAD | 4.71 | $135 |
What jobs cost
What customers paid, from the price Google asks reviewers to report.
| Job | Low25th percentile: 1 in 4 customers paid less than this. | TypicalMedian of the bill customers reported in their Google review (Google asks reviewers for a price range; we use the middle of each range). | High75th percentile: 1 in 4 customers paid more than this. | FairOf customers who rated the price, the share who chose “Great price” or “Reasonable” rather than “Overpriced”. |
|---|---|---|---|---|
| HVAC system maintenance | $37 | $135 | $295 | 98% |
| A/C system maintenance | $39 | $192 | $393 | 98% |
| HVAC system repair | $205 | $406 | $959 | 96% |
| A/C system repair | $216 | $383 | $807 | 97% |
| Install AC | $1.6k | $2.1k | $3.2k | 98% |
| Heating system maintenance | $39 | $124 | $251 | 98% |
| Heating system installation | $1.4k | $1.9k | $2.8k | 98% |
| Repair HVAC | $224 | $359 | $535 | 96% |
| Heating system repair | $161 | $453 | $1.2k | 97% |
| Installation | $1.1k | $2.1k | $2.8k | 99% |
| Install thermostat | $50 | $148 | $437 | 98% |
| HVAC duct & vent installation | $1.2k | $1.9k | $2.8k | 95% |
HVAC Contractors in California at a glance
How the 10 HVAC contractors we rated in California compare, and what customers praise most.
Experts Score grades
A = score 80+, F = below 20.
- Grade A880%
- Grade B220%
- Grade C00%
- Grade D00%
- Grade F00%
Google ratings
Average stars per company.
- 4.90★ and up770%
- 4.80–4.89★110%
- 4.60–4.79★220%
- Below 4.60★00%
What customers praise
Share of Google review highlights.
- Quality22,37820%
- Professionalism27,63324%
- Responsiveness23,45921%
- Punctuality23,09820%
- Value16,77115%
Was the price fair?
All price verdicts left with reviews.
- Great price6,30133%
- Reasonable10,64856%
- Overpriced5893%
- Not sure1,4898%
Price verdicts by year
Share calling it great / reasonable / overpriced.
How we grade
Satisfaction (54%) — Recency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.
Reliability (24%) — How rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.
Craft & service (penalty, up to −10) — Google review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.
Value (14%) — Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.
Momentum (penalty, up to −10) — Penalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.
Replies to reviews (7%) — How often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.