94/100CR Score
Ranked #1 because of its Google rating and availability: 4.9★ from 6,908 Google reviews, open 24/7.
- 4.9★ from 6,908 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 227 E Deer Park Dr, Gaithersburg, MD 20877
Best HVAC Contractors in Rockville, MD (2026)
1,103 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Rockville: GAC Services, CR Score 94/100; 4.9★ from 6,908 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): F.H. Furr Plumbing, Heating, Air Conditioning & Electrical, posts 24/7 hours; ranked #2 of 1,103.
- 17
Most-reviewed: Michael & Son Services, 15,537 Google reviews at 4.7★, the most of 1,103 ranked; ranked #17.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
1,103 Rockville HVAC contractors are ranked here by CR Score, from 8 published factors. 322 are open 24/7, 742 open Saturdays and 508 open Sundays, based on posted hours. The median Google rating is 4.9★ across 1,103 rated businesses.
Top 10 HVAC contractors in Rockville at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | GAC Services | 94 | 4.9★ (6,908) | Gaithersburg, 4 mi away | 24/7 | Overall |
| 2 | F.H. Furr Plumbing, Heating, Air Conditioning & Electrical | 93 | 4.7★ (5,985) | Rockville | 24/7 | Emergencies |
| 3 | Presidential, Inc. | 92 | 4.9★ (1,701) | Gaithersburg, 6 mi away | 24/7 | — |
| 4 | Cyprus Air Heating, Cooling and Fireplaces | 91 | 4.7★ (1,402) | Rockville | 24/7 | — |
| 5 | Michael Bonsby HVAC, Plumbing & Electrical | 91 | 4.8★ (2,083) | Gaithersburg, 6 mi away | 24/7 | — |
| 6 | Parker Pearce Service Experts | 91 | 4.8★ (1,700) | Gaithersburg, 6 mi away | 24/7 | — |
| 7 | CroppMetcalfe | 91 | 4.8★ (7,638) | Fairfax, 15 mi away | 24/7 | — |
| 8 | Len The Plumber Heating & Air, LLC | 90 | 4.6★ (8,136) | Silver Spring, 9 mi away | 24/7 | — |
| 9 | Meade's Heating and Air | 90 | 5.0★ (1,428) | Sterling, 14 mi away | 24/7 | — |
| 10 | Cardinal Plumbing Heating & Air Inc | 90 | 4.9★ (2,958) | Sterling, 16 mi away | 24/7 | — |
The 1,103 best HVAC contractors in Rockville, ranked
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.
Based in Rockville
93/100CR ScoreRanked #2 because of its Google rating and availability: 4.7★ from 5,985 Google reviews, open 24/7.
- 4.7★ from 5,985 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 685 Lofstrand Ln, Rockville, MD 20850
Based in Gaithersburg, 6 mi away
92/100CR ScoreRanked #3 because of its Google rating and availability: 4.9★ from 1,701 Google reviews, open 24/7.
- 4.9★ from 1,701 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 8000 Cessna Ave, Gaithersburg, MD 20879
Based in Rockville
91/100CR ScoreRanked #4 because of its Google rating and availability: 4.7★ from 1,402 Google reviews, open 24/7.
- 4.7★ from 1,402 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 802 Rockville Pike, Rockville, MD 20852
Based in Gaithersburg, 6 mi away
91/100CR ScoreRanked #5 because of its Google rating and availability: 4.8★ from 2,083 Google reviews, open 24/7.
- 4.8★ from 2,083 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 7940 Cessna Ave, Gaithersburg, MD 20879
Based in Gaithersburg, 6 mi away
91/100CR ScoreRanked #6 because of its Google rating and availability: 4.8★ from 1,700 Google reviews, open 24/7.
- 4.8★ from 1,700 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 7901 Beechcraft Ave Suite C, Gaithersburg, MD 20879
Based in Fairfax, 15 mi away
91/100CR ScoreRanked #7 because of its Google rating and availability: 4.8★ from 7,638 Google reviews, open 24/7.
- 4.8★ from 7,638 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 8421 Hilltop Rd, Fairfax, VA 22031
Based in Silver Spring, 9 mi away
90/100CR ScoreRanked #8 because of its Google rating and availability: 4.6★ from 8,136 Google reviews, open 24/7.
- 4.6★ from 8,136 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 550 Forest Glen Rd, Silver Spring, MD 20901
Based in Sterling, 14 mi away
90/100CR ScoreRanked #9 because of its Google rating and availability: 5.0★ from 1,428 Google reviews, open 24/7.
- 5.0★ from 1,428 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 45975 Nokes Blvd Suite 100, Sterling, VA 20166
Based in Sterling, 16 mi away
90/100CR ScoreRanked #10 because of its Google rating and availability: 4.9★ from 2,958 Google reviews, open 24/7.
- 4.9★ from 2,958 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 104 Carpenter Dr Suite D, Sterling, VA 20164
Based in Sterling, 17 mi away
90/100CR ScoreRanked #11 because of its Google rating and availability: 4.9★ from 2,807 Google reviews, open 24/7.
- 4.9★ from 2,807 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 101-A Executive Dr STE 200, Sterling, VA 20166
Based in Gaithersburg, 6 mi away
90/100CR ScoreRanked #12 because of its Google rating and availability: 4.8★ from 666 Google reviews, open 24/7.
- 4.8★ from 666 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 18918 Premiere Ct, Gaithersburg, MD 20879
Based in Gaithersburg, 5 mi away
90/100CR ScoreRanked #13 because of its Google rating and availability: 4.9★ from 298 Google reviews, open 24/7.
- 4.9★ from 298 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 30 N Summit Ave Unit 2, Gaithersburg, MD 20877
Based in Fairfax, 15 mi away
89/100CR ScoreRanked #14 because of its Google rating and availability: 4.9★ from 1,794 Google reviews, open 24/7.
- 4.9★ from 1,794 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2800 Juniper St #10, Fairfax, VA 22031
Based in Sterling, 17 mi away
89/100CR ScoreRanked #15 because of its Google rating and availability: 4.8★ from 5,283 Google reviews, open 24/7.
- 4.8★ from 5,283 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 22977 Eaglewood Ct STE 130, Sterling, VA 20166
Based in Rockville
89/100CR ScoreRanked #16 because of its Google rating and availability: 4.9★ from 116 Google reviews, open 24/7.
- 4.9★ from 116 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4811 Rim Rock Rd, Rockville, MD 20853
Based in Alexandria, 20 mi away
89/100CR ScoreRanked #17 because of its Google rating and review volume: 4.7★ from 15,537 Google reviews, the most Google reviews on this list (15,537).
- 4.7★ from 15,537 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5740 General Washington Dr, Alexandria, VA 22312
Based in Sterling, 15 mi away
89/100CR ScoreRanked #18 because of its Google rating and availability: 4.9★ from 1,501 Google reviews, open 24/7.
- 4.9★ from 1,501 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 45681 Oakbrook Ct STE 101, Sterling, VA 20166
#19 Making Air Right
Based in Clarksburg, 9 mi away
89/100CR ScoreRanked #19 because of its Google rating and availability: 4.9★ from 361 Google reviews, open 24/7.
- 4.9★ from 361 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Silver Spring, 11 mi away
89/100CR ScoreRanked #20 because of its Google rating and availability: 5.0★ from 293 Google reviews, open 24/7.
- 5.0★ from 293 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 9407 New Hampshire Ave, Silver Spring, MD 20903
#21 John C. Flood
Based in Alexandria, 20 mi away
89/100CR ScoreRanked #21 because of its Google rating and availability: 4.8★ from 4,976 Google reviews, open 24/7.
- 4.8★ from 4,976 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 6430 General Green Way, Alexandria, VA 22312
Based in Alexandria, 18 mi away
89/100CR ScoreRanked #22 because of its Google rating and availability: 5.0★ from 959 Google reviews, open 24/7.
- 5.0★ from 959 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5800 Quantrell Ave #1510, Alexandria, VA 22312
Based in Sterling, 15 mi away
89/100CR ScoreRanked #23 because of its Google rating and availability: 4.8★ from 1,701 Google reviews, open 24/7.
- 4.8★ from 1,701 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 45921 Maries Rd, Sterling, VA 20166
#24 United Air Temp
Based in Sterling, 16 mi away
89/100CR ScoreRanked #24 because of its Google rating and availability: 4.8★ from 2,161 Google reviews, open 24/7.
- 4.8★ from 2,161 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 45570 Shepard Dr Ste. #6, Sterling, VA 20164
Based in Ashburn, 17 mi away
88/100CR ScoreRanked #25 because of its Google rating and availability: 4.8★ from 2,314 Google reviews, open 24/7.
- 4.8★ from 2,314 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 20145 Ashbrook Pl #110, Ashburn, VA 20147
HVAC contractors ranked #26 to #50
#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 1,103 ranked HVAC contractors here; the rest are on their profiles.
Also serving Rockville
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 Blessing Mechanical, LLC | 5.0★ (2) | 5 mi |
| Air Flow Services HVAC Inc | 5.0★ (1) | In Rockville |
| Air Supply Inc | In Rockville | |
| Airtek Air Conditioning Inc | In Rockville | |
| Avent Contracting, LLC | 5.0★ (1) | In Rockville |
| COMFORT AIR TECH Hvacr Contractor | In Rockville | |
| Critical Systems, LLC | 3.0★ (2) | In Rockville |
| F.H. Furr Plumbing, Heating, Air Conditioning & Electrical | 4.7★ (4,469) | 25 mi |
| JC & JC HVAC | 4.7★ (503) | 10 mi |
| JDL HVAC & Plumbing Services | 4.8★ (678) | 16 mi |
| Kensington Cooling & Heating | 5.0★ (2) | 6 mi |
| Mccarthy Services | In Rockville | |
| Michael King Inc | In Rockville | |
| Owens & Johnsons Heating and Cooling | 3.0★ (2) | 5 mi |
| Richards Heating & Air Conditioning | In Rockville | |
| Rockville Heating & Air Services | 5.0★ (2) | In Rockville |
| S.L. Johnson Plumbing & Heating | 3.0★ (2) | In Rockville |
| Thornton HVAC Service | In Rockville | |
| Vito Services | 4.7★ (1,351) | In Rockville |
| Y & B Care | 5.0★ (1) | In Rockville |
How much do HVAC contractors cost in Rockville?
National price ranges in USD, not adjusted for Rockville. 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 |
How to check an HVAC contractor's license in Maryland
In Maryland, Maryland State Board of Heating, Ventilation, Air-Conditioning and Refrigeration Contractors licenses Heating, ventilation, air conditioning and refrigeration work.
- Check that the status is active and the name matches the contract or truck.
- Ask for proof of insurance before work starts.
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
When to hire an HVAC contractor in Maryland
HVAC demand peaks in summer for cooling and in winter for heating. Spring and fall are the easiest times to book maintenance or a replacement.
How we ranked Rockville HVAC contractors
We scored 1,103 Rockville 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 Rockville 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 |
HVAC contractors in Rockville: frequently asked questions
Who is the best HVAC contractor in Rockville?
By CR Score, the highest-ranked HVAC contractor in Rockville, MD is GAC Services with a CR Score of 94/100. It has 4.9★ from 6,908 Google reviews. It is open 24/7. F.H. Furr Plumbing, Heating, Air Conditioning & Electrical (#2) and Presidential, Inc. (#3) follow. We ranked 1,103 HVAC contractors on 8 factors, last updated October 22, 2026.
How many HVAC contractors are there in Rockville?
ContractorsRanked ranks 1,103 HVAC contractors serving Rockville, MD. 4 of them are based in Rockville; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which HVAC contractors in Rockville are open 24/7?
322 ranked HVAC contractors in Rockville post 24/7 hours. The highest-ranked are GAC Services (#1), F.H. Furr Plumbing, Heating, Air Conditioning & Electrical (#2) and Presidential, Inc. (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which HVAC contractors in Rockville work on weekends?
742 of 1,103 ranked HVAC contractors post Saturday hours and 508 post Sunday hours. The highest-ranked open Saturdays are GAC Services (#1), F.H. Furr Plumbing, Heating, Air Conditioning & Electrical (#2) and Presidential, Inc. (#3). Posted hours are office hours; crews may book weekend jobs separately.
How do I check an HVAC contractor's license in Maryland?
In Maryland, Maryland State Board of Heating, Ventilation, Air-Conditioning and Refrigeration Contractors handles licensing and covers Heating, ventilation, air conditioning and refrigeration work.
How much does ac replacement cost in Rockville?
AC replacement typically costs $3,887 to $8,073, with $5,978 typical (Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range). This is a national range, not adjusted for Rockville. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Rockville HVAC contractors have?
The median Google rating among 1,103 rated HVAC contractors in Rockville is 4.9★, with a median of 23 reviews. Michael & Son Services has the most, 15,537 reviews, and ranks #17. We adjust ratings for review count, so a few five-star reviews cannot top the list.
When is the best time to hire an HVAC contractor in Rockville?
HVAC demand peaks in summer for cooling and in winter for heating. Spring and fall are the easiest times to book maintenance or a replacement.
Update log for Rockville
- October 2026: CR Scores recalculated for 1,103 hvac contractors serving Rockville.
- October 2026: 7 duplicate listings merged.
More HVAC contractors and Rockville pages
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