1,019 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Glassmanor: Michael & Son Services, CR Score 92/100; 4.7★ from 15,537 Google reviews; open 24/7.
Best for emergencies (open 24/7): United Air Temp, posts 24/7 hours; ranked #2 of 1,019.
Most-reviewed: Michael & Son Services, 8,326 Google reviews at 4.8★, the most of 1,019 ranked after Michael & Son Services; ranked #23.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
1,019 Glassmanor HVAC contractors are ranked here by CR Score, from 8 published factors. 311 are open 24/7, 685 open Saturdays and 477 open Sundays, based on posted hours. The median Google rating is 4.9★ across 1,019 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Michael & Son Services | 92 | 4.7★ (15,537) | Alexandria, 9 mi away | 24/7 | Overall |
| 2 | United Air Temp | 92 | 4.8★ (1,775) | Fort Washington, 2 mi away | 24/7 | Emergencies |
| 3 | John C. Flood | 92 | 4.8★ (4,976) | Alexandria, 9 mi away | 24/7 | — |
| 4 | AZA heating, cooling, plumbing & construction | 91 | 5.0★ (959) | Alexandria, 7 mi away | 24/7 | — |
| 5 | Krafft Service Corporation | 91 | 4.9★ (1,631) | Alexandria, 7 mi away | 24/7 | — |
| 6 | CroppMetcalfe | 91 | 4.8★ (7,638) | Fairfax, 13 mi away | 24/7 | — |
| 7 | Caffi Services | 91 | 4.9★ (508) | Alexandria, 3 mi away | 24/7 | — |
| 8 | AG Services – Electrical, Air Conditioning, Heating & Plumbing | 90 | 4.9★ (440) | Alexandria, 5 mi away | 24/7 | — |
| 9 | OHA HVAC, Plumbing, Chimney & Fireplaces | 90 | 4.9★ (1,794) | Fairfax, 13 mi away | 24/7 | — |
| 10 | United Air Temp | 90 | 4.8★ (1,318) | Alexandria, 8 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 because of its Google rating and review volume: 4.7★ from 15,537 Google reviews, the most Google reviews on this list (15,537).
Based in Fort Washington, 2 mi away
Ranked #2 because of its Google rating and availability: 4.8★ from 1,775 Google reviews, open 24/7.
Based in Alexandria, 9 mi away
Ranked #3 because of its Google rating and availability: 4.8★ from 4,976 Google reviews, open 24/7.
Based in Alexandria, 7 mi away
Ranked #4 because of its Google rating and availability: 5.0★ from 959 Google reviews, open 24/7.
Based in Alexandria, 7 mi away
Ranked #5 because of its Google rating and availability: 4.9★ from 1,631 Google reviews, open 24/7.
Based in Fairfax, 13 mi away
Ranked #6 because of its Google rating and availability: 4.8★ from 7,638 Google reviews, open 24/7.
Based in Alexandria, 3 mi away
Ranked #7 because of its Google rating and availability: 4.9★ from 508 Google reviews, open 24/7.
Based in Alexandria, 5 mi away
Ranked #8 because of its Google rating and availability: 4.9★ from 440 Google reviews, open 24/7.
Based in Fairfax, 13 mi away
Ranked #9 because of its Google rating and availability: 4.9★ from 1,794 Google reviews, open 24/7.
Based in Alexandria, 8 mi away
Ranked #10 because of its Google rating and availability: 4.8★ from 1,318 Google reviews, open 24/7.
Based in Lorton, 12 mi away
Ranked #11 because of its Google rating and availability: 4.7★ from 4,469 Google reviews, open 24/7.
Based in Springfield, 12 mi away
Ranked #12 because of its Google rating and availability: 4.9★ from 966 Google reviews, open 24/7.
Based in Alexandria, 7 mi away
Ranked #13 because of its Google rating and availability: 4.9★ from 326 Google reviews, open 24/7.
Based in Silver Spring, 14 mi away
Ranked #14 because of its Google rating and availability: 4.6★ from 8,136 Google reviews, open 24/7.
Based in Greater Upper Marlboro, 15 mi away
Ranked #15 because of its Google rating and availability: 4.9★ from 1,421 Google reviews, open 24/7.
Based in Washington, D.C., 4 mi away
Ranked #16 because of its Google rating and availability: 4.9★ from 205 Google reviews, open 24/7.
Based in Gaithersburg, 24 mi away
Ranked #17 because of its Google rating and availability: 4.9★ from 6,908 Google reviews, open 24/7.
Based in Waldorf, 15 mi away
Ranked #18 because of its Google rating and availability: 5.0★ from 625 Google reviews, open 24/7.
Based in St. Charles, 7 mi away
Ranked #19 because of its Google rating and availability: 4.9★ from 270 Google reviews, open 24/7.
Based in Lorton, 13 mi away
Ranked #20 because of its Google rating and availability: 4.9★ from 770 Google reviews, open 24/7.
Based in Alexandria, 3 mi away
Ranked #21 because of its Google rating and availability: 4.9★ from 1,720 Google reviews, open 24/7.
Based in Greenbelt, 14 mi away
Ranked #22 because of its Google rating and availability: 4.8★ from 1,306 Google reviews, open 24/7.
Based in Hyattsville, 11 mi away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 8,326 Google reviews, listed on Google as “HVAC contractor”.
Based in Falls Church, 7 mi away
Ranked #24 because of its Google rating and availability: 4.9★ from 208 Google reviews, open 24/7.
Based in Lorton, 13 mi away
Ranked #25 because of its Google rating and availability: 4.9★ from 507 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 1,019 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 |
|---|---|---|
| ABA Climate Control | 5.0★ (2) | 7 mi |
| Back 2 Basic HVAC LLC | 5.0★ (2) | 4 mi |
| Barivo HVAC Repair Washington | 5.0★ (2) | 6 mi |
| Cora AC | 5.0★ (2) | 5 mi |
| Coreno HVAC Repair Washington | 5.0★ (2) | 6 mi |
| Cyprus Air Heating, Cooling and Fireplaces | 4.3★ (2,189) | 6 mi |
| DC HVAC, Heating and Air Conditioning | 5.0★ (2) | 5 mi |
| Helino HVAC Repair Washington | 5.0★ (2) | 7 mi |
| Heravo HVAC Repair Washington | 5.0★ (2) | 6 mi |
| Homestead Handymen HVAC/R, LLC | 5.0★ (2) | 4 mi |
| Horizon Mechanical Services LLC | 5.0★ (2) | 7 mi |
| Logan Mechanical LLC | 4.7★ (155) | 6 mi |
| McCarthy Services | 4.4★ (3,547) | 12 mi |
| Pavilo HVAC Repair Washington | 5.0★ (2) | 7 mi |
| Perfect Temp Heating & Cooling | 5.0★ (2) | 7 mi |
| Teravo HVAC Repair Washington | 5.0★ (2) | 7 mi |
| TRINITY PRO SERVICES | 4.7★ (257) | 4 mi |
| Ultra Painting HVAC Pros | 5.0★ (2) | 1 mi |
| Xavino HVAC Repair Washington | 5.0★ (2) | 6 mi |
| Zelavo HVAC Repair Washington | 5.0★ (2) | 6 mi |
National price ranges in USD, not adjusted for Glassmanor. 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 1,019 Glassmanor 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 Glassmanor 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 |