1,411 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Monrovia: Aire Serv of Pasadena, CR Score 64/100; 4.9★ from 394 Google reviews; open 24/7.
Best for emergencies (open 24/7): Service Hero Plumbing, HVAC, and Electrical, posts 24/7 hours; ranked #2 of 1,411.
Most-reviewed: Service Champions Plumbing, Heating & AC, 6,978 Google reviews at 4.9★, the most of 1,411 ranked; ranked #18.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
1,411 Monrovia HVAC contractors are ranked here by CR Score, from ten published factors. 491 are open 24/7, 1,084 open Saturdays and 793 open Sundays, based on posted hours. The median Google rating is 4.9★ across 1,411 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Aire Serv of Pasadena | 64 | 4.9★ (394) | Arcadia, 2 mi away | 24/7 | Overall |
| 2 | Service Hero Plumbing, HVAC, and Electrical | 64 | 4.8★ (1,506) | Covina, 8 mi away | 24/7 | Emergencies |
| 3 | NexGen HVAC & Plumbing | 63 | 4.7★ (538) | Arcadia, 3 mi away | 24/7 | — |
| 4 | JW Plumbing, Heating and Air | 62 | 4.8★ (2,541) | Los Angeles, 16 mi away | 24/7 | — |
| 5 | Brody Pennell Heating & Air Conditioning | 62 | 4.9★ (4,606) | Los Angeles, 23 mi away | 24/7 | — |
| 6 | Purified Air Heating and Air Conditioning, Inc | 62 | 5.0★ (251) | Pasadena, 9 mi away | 24/7 | — |
| 7 | Power Pro Plumbing Heating & Air | 61 | 4.9★ (1,582) | Cerritos, 19 mi away | 24/7 | — |
| 8 | Steve's Five Star Service | 61 | 4.9★ (1,292) | Upland, 18 mi away | 24/7 | — |
| 9 | Ace Pelizon Plumbing, Heating & Cooling | 61 | 4.7★ (426) | Covina, 8 mi away | 24/7 | — |
| 10 | Duarte Heating & Air Conditioning | 61 | 5.0★ (64) | Duarte, 2 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and trade focus: 4.9★ from 394 Google reviews, listed on Google as “HVAC contractor”.
Based in Covina, 8 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 1,506 Google reviews, listed on Google as “HVAC contractor”.
Based in Arcadia, 3 mi away
Ranked #3 because of its Google rating and trade focus: 4.7★ from 538 Google reviews, listed on Google as “HVAC contractor”.
Based in Los Angeles, 16 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 2,541 Google reviews, listed on Google as “HVAC contractor”.
Based in Los Angeles, 23 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 4,606 Google reviews, listed on Google as “HVAC contractor”.
Based in Pasadena, 9 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 251 Google reviews, listed on Google as “HVAC contractor”.
Based in Cerritos, 19 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 1,582 Google reviews, listed on Google as “HVAC contractor”.
Based in Upland, 18 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 1,292 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Covina, 8 mi away
Ranked #9 because of its Google rating and trade focus: 4.7★ from 426 Google reviews, listed on Google as “HVAC contractor”.
Based in Duarte, 2 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 64 Google reviews, listed on Google as “HVAC contractor”.
Based in Hawthorne, 25 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 3,299 Google reviews, listed on Google as “HVAC contractor”.
Based in Arcadia, 2 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 47 Google reviews, listed on Google as “HVAC contractor”.
Based in Anaheim, 22 mi away
Ranked #13 because of its Google rating and trade focus: 4.8★ from 2,813 Google reviews, listed on Google as “HVAC contractor”.
Based in Montclair, 19 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 977 Google reviews, listed on Google as “HVAC contractor”.
Based in Pasadena, 6 mi away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 142 Google reviews, listed on Google as “HVAC contractor”.
Based in Brea, 16 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 547 Google reviews, listed on Google as “HVAC contractor”.
Based in San Dimas, 11 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 251 Google reviews, listed on Google as “HVAC contractor”.
Based in Brea, 18 mi away
Ranked #18 because of its Google rating and review volume: 4.9★ from 6,978 Google reviews, the most in Monrovia.
Based in Pasadena, 8 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 94 Google reviews, listed on Google as “HVAC contractor”.
Based in Chino, 20 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 969 Google reviews, listed on Google as “Air conditioning repair service”.
Based in Monterey Park, 11 mi away
Ranked #21 because of its Google rating and trade focus: 4.8★ from 284 Google reviews, listed on Google as “Air conditioning contractor”.
Based in West Covina, 8 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 81 Google reviews, listed on Google as “HVAC contractor”.
Based in Los Angeles, 16 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 434 Google reviews, listed on Google as “HVAC contractor”.
Based in San Dimas, 11 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 122 Google reviews, listed on Google as “HVAC contractor”.
Based in Glendale, 14 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 275 Google reviews, listed on Google as “Air conditioning contractor”.
#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 1,411 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 |
|---|---|---|
| A&M heating A/C | In Monrovia | |
| Accurate Electric, Plumbing, Heating and Air | 4.9★ (951) | 7 mi |
| Air Conditioning ColdPro | 5.0★ (2) | 5 mi |
| Alliance Professional HVAC | 5.0★ (2) | 7 mi |
| Arcadias Heating and Air Conditioning | 5.0★ (2) | In Monrovia |
| Ayman Ibrahim HVAC Contractor | 5.0★ (84) | 7 mi |
| Baldwin Park HVAC Services | 5.0★ (2) | 5 mi |
| Coastal Heating & AC Repair Monterey Park | 5.0★ (2) | 10 mi |
| Condor Inc | 5.0★ (2) | 6 mi |
| Fresh Duct Clean Inc. | 3.0★ (2) | 4 mi |
| GasperAir, Inc. | In Monrovia | |
| Golden Breeze Cooling & Heating LLC | 3.0★ (2) | 7 mi |
| Hvac Parts & Supplies | 3.0★ (2) | 7 mi |
| JMS Heating & Cooling | In Monrovia | |
| Joe's Heating & Air Conditioning Pasadena | 5.0★ (26) | 6 mi |
| Piggies Air Conditioning | 4.8★ (37) | 6 mi |
| Premier Construction Glendora | 5.0★ (2) | 7 mi |
| Valley Air Conditioning & Heating | 5.0★ (2) | 6 mi |
| West Covina Hvac Services | 5.0★ (2) | 9 mi |
| Wukmir Heating and Air Conditioning | 5.0★ (2) | 5 mi |
National price ranges in USD, not adjusted for Monrovia. 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 1,411 Monrovia 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 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 Monrovia 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 |