Top 26 of 1,013 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank
25 of the 26 HVAC contractors on this list post 24/7 hours. 24/7 businesses come first, then same-day, each ranked by CR Score with availability weighted higher.
#1 for emergency heating and cooling in North Potomac: GAC Services, open 24/7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
| Rank | Business | CR Score | Google rating | Based in | Hours |
|---|---|---|---|---|---|
| 1 | GAC Services | 66 | 4.9★ (6,908) | Gaithersburg, 6 mi away | 24/7 |
| 2 | F.H. Furr Plumbing, Heating, Air Conditioning & Electrical | 65 | 4.7★ (5,985) | Rockville, 7 mi away | 24/7 |
| 3 | Cardinal Plumbing Heating & Air Inc | 64 | 4.9★ (2,958) | Sterling, 11 mi away | 24/7 |
| 4 | Snell Home Services | 64 | 4.8★ (5,283) | Sterling, 12 mi away | 24/7 |
| 5 | CroppMetcalfe | 64 | 4.8★ (7,638) | Fairfax, 14 mi away | 24/7 |
| 6 | Meade's Heating and Air | 63 | 5.0★ (1,428) | Sterling, 9 mi away | 24/7 |
| 7 | Presidential, Inc. | 63 | 4.9★ (1,701) | Gaithersburg, 8 mi away | 24/7 |
| 8 | Michael Bonsby HVAC, Plumbing & Electrical | 63 | 4.8★ (2,083) | Gaithersburg, 8 mi away | 24/7 |
| 9 | AllTech Services, Inc | 63 | 4.9★ (2,807) | Sterling, 12 mi away | 24/7 |
| 10 | Parker Pearce Service Experts | 63 | 4.8★ (1,700) | Gaithersburg, 8 mi away | 24/7 |
24/7 hours mean the business says its phone is answered around the clock. Arrival time depends on where the crew is. Ask for an arrival window when you call.
Open 24/7 · 4.9 from 6,908 Google reviews
#2F.H. Furr Plumbing, Heating, Air Conditioning & Electrical
Open 24/7 · 4.7 from 5,985 Google reviews
#3Cardinal Plumbing Heating & Air Inc
Open 24/7 · 4.9 from 2,958 Google reviews
Open 24/7 · 4.8 from 5,283 Google reviews
Open 24/7 · 4.8 from 7,638 Google reviews
Open 24/7 · 5.0 from 1,428 Google reviews
Open 24/7 · 4.9 from 1,701 Google reviews
#8Michael Bonsby HVAC, Plumbing & Electrical
Open 24/7 · 4.8 from 2,083 Google reviews
24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights. The full ranking of all 1,013 is on the HVAC contractors page.
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 6,908 Google reviews, listed on Google as “Heating contractor”.
Based in Rockville, 7 mi away
Ranked #2 because of its Google rating and trade focus: 4.7★ from 5,985 Google reviews, listed on Google as “HVAC contractor”.
Based in Sterling, 11 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 2,958 Google reviews, listed on Google as “HVAC contractor”.
Based in Sterling, 12 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 5,283 Google reviews, listed on Google as “HVAC contractor”.
Based in Fairfax, 14 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 7,638 Google reviews, listed on Google as “HVAC contractor”.
Based in Sterling, 9 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 1,428 Google reviews, listed on Google as “HVAC contractor”.
Based in Gaithersburg, 8 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 1,701 Google reviews, listed on Google as “HVAC contractor”.
Based in Gaithersburg, 8 mi away
Ranked #8 because of its Google rating and trade focus: 4.8★ from 2,083 Google reviews, listed on Google as “HVAC contractor”.
Based in Sterling, 12 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 2,807 Google reviews, listed on Google as “HVAC contractor”.
Based in Gaithersburg, 8 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 1,700 Google reviews, listed on Google as “HVAC contractor”.
Based in Sterling, 9 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 1,701 Google reviews, listed on Google as “HVAC contractor”.
Based in Silver Spring, 14 mi away
Ranked #12 because of its Google rating and trade focus: 4.6★ from 8,136 Google reviews, listed on Google as “HVAC contractor”.
Based in Sterling, 10 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 1,501 Google reviews, listed on Google as “HVAC contractor”.
Based in Rockville, 7 mi away
Ranked #14 because of its Google rating and trade focus: 4.7★ from 1,402 Google reviews, listed on Google as “HVAC contractor”.
Based in Ashburn, 11 mi away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 2,314 Google reviews, listed on Google as “HVAC contractor”.
Based in Sterling, 11 mi away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 2,161 Google reviews, listed on Google as “HVAC contractor”.
Based in Rockville, 7 mi away
Ranked #17 because of its Google rating and trade focus: 4.7★ from 1,351 Google reviews, listed on Google as “HVAC contractor”.
Based in Clarksburg, 4 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 361 Google reviews, listed on Google as “HVAC contractor”.
Based in Alexandria, 21 mi away
Ranked #19 because of its Google rating and review volume: 4.7★ from 15,537 Google reviews.
Based in Leesburg, 15 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 3,718 Google reviews, listed on Google as “HVAC contractor”.
Based in Gaithersburg, 8 mi away
Ranked #21 because of its Google rating and trade focus: 4.8★ from 666 Google reviews, listed on Google as “HVAC contractor”.
Based in Fairfax, 14 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 1,794 Google reviews, listed on Google as “HVAC contractor”.
Based in Herndon, 11 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 745 Google reviews, listed on Google as “HVAC contractor”.
Based in Gaithersburg, 6 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 298 Google reviews, listed on Google as “HVAC contractor”.
Based in Ashburn, 12 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 710 Google reviews, listed on Google as “HVAC contractor”.
#1 to #25 are shown in full above. Here are #26 to #26, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Air 1 Mechanical Heating and Cooling | 61 | 4.9★ (440) | 10 mi |
Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.
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 |
|---|---|---|
| Reputation | 15% | Google star rating, adjusted for how many reviews back it |
| Credentials | 15% | Active state license, bond and workers’ comp on file |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list |
| Recency | 5% | Share of reviews from the last 12 months |
| Availability | 15% | Weekly open hours, Saturday, Sunday, 24/7 or same-day |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) |
| Proximity | 5% | Based in the city scores highest, less the farther away it is |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are |