1,132 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Shaw: Michael & Son Services, CR Score 64/100; 4.7★ from 15,537 Google reviews; open 24/7.
Best for emergencies (open 24/7): CroppMetcalfe, posts 24/7 hours; ranked #2 of 1,132.
Most-reviewed: Michael & Son Services, 8,326 Google reviews at 4.8★, the most of 1,132 ranked after Michael & Son Services; ranked #7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
1,132 Shaw HVAC contractors are ranked here by CR Score, from ten published factors. 353 are open 24/7, 764 open Saturdays and 518 open Sundays, based on posted hours. The median Google rating is 4.9★ across 1,132 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Michael & Son Services | 64 | 4.7★ (15,537) | Alexandria, 11 mi away | 24/7 | Overall |
| 2 | CroppMetcalfe | 64 | 4.8★ (7,638) | Fairfax, 12 mi away | 24/7 | Emergencies |
| 3 | Len The Plumber Heating & Air, LLC | 64 | 4.6★ (8,136) | Silver Spring, 7 mi away | 24/7 | — |
| 4 | John C. Flood | 63 | 4.8★ (4,976) | Alexandria, 11 mi away | 24/7 | — |
| 5 | AZA heating, cooling, plumbing & construction | 63 | 5.0★ (959) | Alexandria, 9 mi away | 24/7 | — |
| 6 | Krafft Service Corporation | 63 | 4.9★ (1,631) | Alexandria, 9 mi away | 24/7 | — |
| 7 | Michael & Son Services | 63 | 4.8★ (8,326) | Hyattsville, 9 mi away | Sat · Sun | Most reviews |
| 8 | United Air Temp | 63 | 4.8★ (1,775) | Fort Washington, 8 mi away | 24/7 | — |
| 9 | GAC Services | 63 | 4.9★ (6,908) | Gaithersburg, 18 mi away | 24/7 | — |
| 10 | OHA HVAC, Plumbing, Chimney & Fireplaces | 62 | 4.9★ (1,794) | Fairfax, 11 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 review volume: 4.7★ from 15,537 Google reviews, the most in Shaw.
Based in Fairfax, 12 mi away
Ranked #2 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, 7 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 Alexandria, 11 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 4,976 Google reviews, listed on Google as “HVAC contractor”.
Based in Alexandria, 9 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 959 Google reviews, listed on Google as “HVAC contractor”.
Based in Alexandria, 9 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 1,631 Google reviews, listed on Google as “HVAC contractor”.
Based in Hyattsville, 9 mi away
Ranked #7 because of its Google rating and trade focus: 4.8★ from 8,326 Google reviews, listed on Google as “HVAC contractor”.
Based in Fort Washington, 8 mi away
Ranked #8 because of its Google rating and trade focus: 4.8★ from 1,775 Google reviews, listed on Google as “HVAC contractor”.
Based in Gaithersburg, 18 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 6,908 Google reviews, listed on Google as “Heating contractor”.
Based in Fairfax, 11 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 1,794 Google reviews, listed on Google as “HVAC contractor”.
Based in Rockville, 14 mi away
Ranked #11 because of its Google rating and trade focus: 4.7★ from 5,985 Google reviews, listed on Google as “HVAC contractor”.
Based in Alexandria, 7 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 508 Google reviews, listed on Google as “HVAC contractor”.
Based in Greenbelt, 10 mi away
Ranked #13 because of its Google rating and trade focus: 4.8★ from 1,306 Google reviews, listed on Google as “HVAC contractor”.
Based in Washington, D.C., 3 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 205 Google reviews, listed on Google as “HVAC contractor”.
Based in Silver Spring, 7 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 293 Google reviews, listed on Google as “HVAC contractor”.
Based in Clarksburg, 4 mi away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 302 Google reviews, listed on Google as “HVAC contractor”.
Based in Alexandria, 11 mi away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 1,318 Google reviews, listed on Google as “HVAC contractor”.
Based in Alexandria, 8 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 440 Google reviews, listed on Google as “HVAC contractor”.
Based in Lorton, 16 mi away
Ranked #19 because of its Google rating and trade focus: 4.7★ from 4,469 Google reviews, listed on Google as “HVAC contractor”.
Based in Washington, D.C., 3 mi away
Ranked #20 because of its Google rating and trade focus: 4.4★ from 1,519 Google reviews, listed on Google as “HVAC contractor”.
Based in Springfield, 13 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 966 Google reviews, listed on Google as “HVAC contractor”.
Based in Greater Upper Marlboro, 16 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 1,421 Google reviews, listed on Google as “HVAC contractor”.
Based in Greater Upper Marlboro, 5 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 379 Google reviews, listed on Google as “HVAC contractor”.
Based in Falls Church, 7 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 208 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Vienna, 13 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 627 Google reviews, listed on Google as “HVAC contractor”.
#1 to #25 are shown in full above. Here are #27 to #50, in CR Score order; each links to its profile. We publish the top 50 of 1,132 ranked HVAC contractors here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 27 | Thomas E Clark Inc | 61 | 4.8★ (299) | 7 mi |
| 28 | Tim Whistler Plumbing, Gas Fitting, HVAC, and Electrical | 61 | 4.8★ (291) | 7 mi |
| 29 | Cyprus Air Heating, Cooling and Fireplaces | 61 | 4.7★ (1,402) | 13 mi |
| 50 | United Air Temp | 60 | 4.4★ (4,301) | 15 mi |
National price ranges in USD, not adjusted for Shaw. 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 District of Columbia, DC Board of Industrial Trades (Department of Licensing and Consumer Protection) licenses Refrigeration and air conditioning mechanic licenses.
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 1,132 Shaw 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 Shaw 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 |