971 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Ashton-Sandy Spring: GAC Services, CR Score 65/100; 4.9★ from 6,908 Google reviews; open 24/7.
Best for emergencies (open 24/7): F.H. Furr Plumbing, Heating, Air Conditioning & Electrical, posts 24/7 hours; ranked #2 of 971.
Most-reviewed: Michael & Son Services, 8,326 Google reviews at 4.8★, the most of 971 ranked; ranked #12.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
971 Ashton-Sandy Spring HVAC contractors are ranked here by CR Score, from ten published factors. 303 are open 24/7, 627 open Saturdays and 445 open Sundays, based on posted hours. The median Google rating is 4.8★ across 971 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | GAC Services | 65 | 4.9★ (6,908) | Gaithersburg, 9 mi away | 24/7 | Overall |
| 2 | F.H. Furr Plumbing, Heating, Air Conditioning & Electrical | 64 | 4.7★ (5,985) | Rockville, 8 mi away | 24/7 | Emergencies |
| 3 | Len The Plumber Heating & Air, LLC | 63 | 4.6★ (8,136) | Silver Spring, 9 mi away | 24/7 | — |
| 4 | Presidential, Inc. | 63 | 4.9★ (1,701) | Gaithersburg, 9 mi away | 24/7 | — |
| 5 | Michael Bonsby HVAC, Plumbing & Electrical | 63 | 4.8★ (2,083) | Gaithersburg, 9 mi away | 24/7 | — |
| 6 | Parker Pearce Service Experts | 63 | 4.8★ (1,700) | Gaithersburg, 9 mi away | 24/7 | — |
| 7 | Environmental Systems Associates | 62 | 4.9★ (658) | Columbia, 9 mi away | 24/7 | — |
| 8 | Cyprus Air Heating, Cooling and Fireplaces | 62 | 4.7★ (1,402) | Rockville, 9 mi away | 24/7 | — |
| 9 | Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical | 61 | 4.8★ (4,514) | Baltimore, 18 mi away | 24/7 | — |
| 10 | Cool Breeze Plumbing, Heating & A/C | 61 | 4.8★ (666) | Gaithersburg, 9 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 6,908 Google reviews, listed on Google as “Heating contractor”.
Based in Rockville, 8 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 Silver Spring, 9 mi away
Ranked #3 because of its Google rating and trade focus: 4.6★ from 8,136 Google reviews, listed on Google as “HVAC contractor”.
Based in Gaithersburg, 9 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 1,701 Google reviews, listed on Google as “HVAC contractor”.
Based in Gaithersburg, 9 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 2,083 Google reviews, listed on Google as “HVAC contractor”.
Based in Gaithersburg, 9 mi away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 1,700 Google reviews, listed on Google as “HVAC contractor”.
Based in Columbia, 9 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 658 Google reviews, listed on Google as “HVAC contractor”.
Based in Rockville, 9 mi away
Ranked #8 because of its Google rating and trade focus: 4.7★ from 1,402 Google reviews, listed on Google as “HVAC contractor”.
Based in Baltimore, 18 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 4,514 Google reviews, listed on Google as “HVAC contractor”.
Based in Gaithersburg, 9 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 666 Google reviews, listed on Google as “HVAC contractor”.
Based in Greenbelt, 13 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 1,306 Google reviews, listed on Google as “HVAC contractor”.
Based in Hyattsville, 17 mi away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 8,326 Google reviews, listed on Google as “HVAC contractor”.
Based in Fairfax, 23 mi away
Ranked #13 because of its Google rating and trade focus: 4.8★ from 7,638 Google reviews, listed on Google as “HVAC contractor”.
Based in Silver Spring, 10 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 293 Google reviews, listed on Google as “HVAC contractor”.
Based in Eldersburg, 9 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 699 Google reviews, listed on Google as “HVAC contractor”.
Based in Laurel, 10 mi away
Ranked #16 because of its Google rating and trade focus: 4.4★ from 3,510 Google reviews, listed on Google as “HVAC contractor”.
Based in Gaithersburg, 10 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 298 Google reviews, listed on Google as “HVAC contractor”.
Based in Columbia, 7 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 485 Google reviews, listed on Google as “HVAC contractor”.
Based in Rockville, 8 mi away
Ranked #19 because of its Google rating and trade focus: 4.8★ from 838 Google reviews, listed on Google as “HVAC contractor”.
Based in Aspen Hill, 9 mi away
Ranked #20 because of its Google rating and trade focus: 4.7★ from 419 Google reviews, listed on Google as “HVAC contractor”.
Based in Rockville, 7 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 116 Google reviews, listed on Google as “HVAC contractor”.
Based in Ashton-Sandy Spring
Ranked #22 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “HVAC contractor”.
Based in Silver Spring, 10 mi away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 299 Google reviews, listed on Google as “HVAC contractor”.
Based in Silver Spring, 10 mi away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 291 Google reviews, listed on Google as “HVAC contractor”.
Based in Sterling, 25 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 2,958 Google reviews, listed on Google as “HVAC 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 971 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 |
|---|---|---|
| Ace Tech Appliance | In Ashton-Sandy Spring | |
| Air Max HVACR | 5.0★ (2) | In Ashton-Sandy Spring |
| Beltway Air Conditioning, Heating & Plumbing | 4.9★ (90) | 9 mi |
| Bill Myers Inc | 4.5★ (2) | 7 mi |
| Boiler Rounds And Complete Mechanical Services, LLC | 5.0★ (1) | In Ashton-Sandy Spring |
| Complete Comfort Services LLC | In Ashton-Sandy Spring | |
| Conrod's Plumbing Heating and A/C | 5.0★ (2) | 10 mi |
| Coutts Plumbing, Inc | 5.0★ (2) | In Ashton-Sandy Spring |
| Davis Plumbing & Heating Inc | 5.0★ (2) | In Ashton-Sandy Spring |
| Energy Systems Inc | 3.0★ (2) | 7 mi |
| JC & JC HVAC | 4.7★ (503) | 4 mi |
| Langway Brothers | In Ashton-Sandy Spring | |
| Len The Plumber Heating & Air, LLC | 4.7★ (15,911) | 19 mi |
| One Hour Air Conditioning & Heating® of Gaithersburg | 4.8★ (302) | 15 mi |
| Palmer Heating and Cooling | 5.0★ (2) | 10 mi |
| R D Springer Plumbing & Heating | 5.0★ (2) | 9 mi |
| Right Temp HVAC | In Ashton-Sandy Spring | |
| Rockville Heating & Air Services | 5.0★ (2) | 10 mi |
| United Air Temp | 4.8★ (171) | 12 mi |
| Vito Services | 4.7★ (1,351) | 8 mi |
National price ranges in USD, not adjusted for Ashton-Sandy Spring. 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 Maryland, Maryland State Board of Heating, Ventilation, Air-Conditioning and Refrigeration Contractors licenses Heating, ventilation, air conditioning and refrigeration work.
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
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.
We scored 971 Ashton-Sandy Spring 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 Ashton-Sandy Spring 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 |