621 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Fremont: Heating And Air Experts - Affordable HVAC Contractor in Fremont, California, CR Score 94/100; 5.0★ from 761 Google reviews; open 24/7.
Best for emergencies (open 24/7): AIS Heating & Air Conditioning, posts 24/7 hours; ranked #2 of 621.
Most-reviewed: Service Champions, 4,721 Google reviews at 4.9★, the most of 621 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
621 Fremont HVAC contractors are ranked here by CR Score, from 8 published factors. 180 are open 24/7, 415 open Saturdays and 328 open Sundays, based on posted hours. The median Google rating is 4.9★ across 621 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Heating And Air Experts - Affordable HVAC Contractor in Fremont, California | 94 | 5.0★ (761) | Fremont | 24/7 | Overall |
| 2 | AIS Heating & Air Conditioning | 93 | 4.9★ (723) | Fremont | 24/7 | Emergencies |
| 3 | Jazz Heating, Air Conditioning and Plumbing | 93 | 4.9★ (3,438) | Pleasanton, 11 mi away | 24/7 | — |
| 4 | Service Champions | 93 | 4.9★ (3,407) | San Jose, 11 mi away | 24/7 | — |
| 5 | Service Champions | 93 | 4.9★ (4,721) | Livermore, 14 mi away | 24/7 | Most reviews |
| 6 | IRBIS Air Plumbing Electrical | 91 | 4.9★ (1,466) | San Jose, 12 mi away | 24/7 | — |
| 7 | Service Champions | 91 | 4.8★ (2,337) | Pleasanton, 11 mi away | 24/7 | — |
| 8 | Evergreen Air HVAC Corp | 91 | 5.0★ (115) | Fremont | 24/7 | — |
| 9 | Chill Heating and Cooling | 91 | 5.0★ (1,017) | San Ramon, 16 mi away | 24/7 | — |
| 10 | Fuse HVAC, Refrigeration, Electrical & Plumbing | 90 | 4.9★ (1,034) | Santa Clara, 13 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 in Fremont
Based in Fremont
Ranked #1 because of its Google rating and availability: 5.0★ from 761 Google reviews, open 24/7.
Based in Fremont
Ranked #2 because of its Google rating and availability: 4.9★ from 723 Google reviews, open 24/7.
Based in Pleasanton, 11 mi away
Ranked #3 because of its Google rating and availability: 4.9★ from 3,438 Google reviews, open 24/7.
Based in San Jose, 11 mi away
Ranked #4 because of its Google rating and availability: 4.9★ from 3,407 Google reviews, open 24/7.
Based in Livermore, 14 mi away
Ranked #5 because of its Google rating and availability: 4.9★ from 4,721 Google reviews, open 24/7.
Based in San Jose, 12 mi away
Ranked #6 because of its Google rating and availability: 4.9★ from 1,466 Google reviews, open 24/7.
Based in Pleasanton, 11 mi away
Ranked #7 because of its Google rating and availability: 4.8★ from 2,337 Google reviews, open 24/7.
Based in Fremont
Ranked #8 because of its Google rating and availability: 5.0★ from 115 Google reviews, open 24/7.
Based in San Ramon, 16 mi away
Ranked #9 because of its Google rating and availability: 5.0★ from 1,017 Google reviews, open 24/7.
Based in Santa Clara, 13 mi away
Ranked #10 because of its Google rating and availability: 4.9★ from 1,034 Google reviews, open 24/7.
Based in San Jose, 14 mi away
Ranked #11 because of its Google rating and availability: 4.9★ from 1,142 Google reviews, open 24/7.
Based in Palo Alto, 12 mi away
Ranked #12 because of its Google rating and availability: 5.0★ from 444 Google reviews, open 24/7.
Based in Hayward, 9 mi away
Ranked #13 because of its Google rating and availability: 4.7★ from 863 Google reviews, open 24/7.
Based in San Jose, 12 mi away
Ranked #14 because of its Google rating and availability: 4.9★ from 400 Google reviews, open 24/7.
Based in Livermore, 17 mi away
Ranked #15 because of its Google rating and availability: 4.9★ from 920 Google reviews, open 24/7.
Based in Newark, 3 mi away
Ranked #16 because of its Google rating and availability: 4.8★ from 122 Google reviews, open 24/7.
Based in Menlo Park, 12 mi away
Ranked #17 because of its Google rating and availability: 5.0★ from 208 Google reviews, open 24/7.
Based in Foster City, 2 mi away
Ranked #18 because of its Google rating and availability: 4.9★ from 74 Google reviews, open 24/7.
Based in Fremont
Ranked #19 because of its Google rating and availability: 4.8★ from 67 Google reviews, open 24/7.
Based in Hayward, 8 mi away
Ranked #20 because of its Google rating and availability: 4.9★ from 172 Google reviews, open 24/7.
Based in Pleasanton, 11 mi away
Ranked #21 because of its Google rating and availability: 5.0★ from 153 Google reviews, open 24/7.
Based in San Jose, 12 mi away
Ranked #22 because of its Google rating and availability: 4.6★ from 1,308 Google reviews, open 24/7.
Based in Danville, 5 mi away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 1,046 Google reviews, listed on Google as “HVAC contractor”.
Based in Mountain View, 11 mi away
Ranked #24 because of its Google rating and availability: 4.9★ from 216 Google reviews, open 24/7.
Based in Livermore, 18 mi away
Ranked #25 because of its Google rating and availability: 4.9★ from 549 Google reviews, open 24/7.
#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 621 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 |
|---|---|---|
| Advanced Technical Hvac | 5.0★ (54) | 8 mi |
| All State Insulation | 5.0★ (25) | In Fremont |
| Alton | 5.0★ (1) | In Fremont |
| Barker Heating & Cooling | 4.8★ (1,930) | 19 mi |
| Electrical & Mechanical Solutions | 5.0★ (1) | In Fremont |
| Flide HVAC & Airduct Cleaning Fremont | 5.0★ (1) | In Fremont |
| Furnace / AC repair service. Commercial refrigeration, HVAC | 5.0★ (2) | In Fremont |
| Fuse Electrical | 4.9★ (82) | In Fremont |
| Greenfriendly HVAC and Plumbing | In Fremont | |
| Hayward HVAC Heating & Cooling | 5.0★ (1) | In Fremont |
| heating and furnace service | 4.0★ (2) | In Fremont |
| Henry Taylor Heating and Cooling | 5.0★ (1) | In Fremont |
| HVAC Services | In Fremont | |
| Midair HVAC Hardware & AC repair | In Fremont | |
| One Call Services | 4.8★ (54) | In Fremont |
| Pacific Coast Home Services | 4.4★ (735) | 12 mi |
| R & J Heating & Air | In Fremont | |
| RCS Mechanical Services | 4.0★ (2) | In Fremont |
| Service Professionals Heating & Cooling | 5.0★ (1) | In Fremont |
| Shaw Plumbing & Heating | 5.0★ (1) | In Fremont |
National price ranges in USD, not adjusted for Fremont. 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 |
In California, Contractors State License Board (CSLB) licenses C-20 Warm-Air Heating, Ventilating and Air-Conditioning contractor license.
Jobs of $1,000 or more in labor and materials (from January 1, 2025).
No chip usually means we have not matched a state record yet. Check the lookup yourself before you hire.
Guide checked October 2026. How we verify licenses
California'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 621 Fremont HVAC contractors on 8 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. Unknown factors are left out of the score, not counted as zero. Scores last refreshed October 22, 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 Fremont data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |