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ContractorsRanked

Best HVAC Contractors in Damascus, MD (2026)

635 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Damascus: GAC Services, CR Score 93/100; 4.9★ from 6,908 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Presidential, Inc., posts 24/7 hours; ranked #2 of 635.

  3. 24

    Most-reviewed: Len The Plumber Heating & Air, LLC, 8,136 Google reviews at 4.6★, the most of 635 ranked; ranked #24.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

635 Damascus HVAC contractors are ranked here by CR Score, from 8 published factors. 185 are open 24/7, 396 open Saturdays and 284 open Sundays, based on posted hours. The median Google rating is 4.8★ across 635 rated businesses.

Top 10 HVAC contractors in Damascus at a glance

Top 10 HVAC contractors in Damascus at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1GAC Services934.9★ (6,908)Gaithersburg, 11 mi away24/7Overall
2Presidential, Inc.924.9★ (1,701)Gaithersburg, 8 mi away24/7Emergencies
3Michael Bonsby HVAC, Plumbing & Electrical914.8★ (2,083)Gaithersburg, 8 mi away24/7—
4Parker Pearce Service Experts914.8★ (1,700)Gaithersburg, 9 mi away24/7—
5F.H. Furr Plumbing, Heating, Air Conditioning & Electrical904.7★ (5,985)Rockville, 14 mi away24/7—
6Cool Breeze Plumbing, Heating & A/C904.8★ (666)Gaithersburg, 9 mi away24/7—
7One Hour Air Conditioning & Heating® of Mount Airy904.7★ (852)Mount Airy, 7 mi away24/7—
8Prestige Home Services895.0★ (61)Clarksburg, 1 mi away24/7—
9Wenbrooke Services - Electrical, Plumbing, Heating and Air894.8★ (1,208)Frederick, 13 mi away24/7—
10Meade's Heating and Air895.0★ (1,428)Sterling, 22 mi away24/7—

The 635 best HVAC contractors in Damascus, 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.

  1. Ranked #1 in Damascus

    #1 GAC Services

    Based in Gaithersburg, 11 mi away

    93/100CR 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
    View profile for GAC Services(301) 202-1641

  15. #15 M.E. Flow

    Based in Leesburg, 22 mi away

    88/100CR Score

    Ranked #15 because of its Google rating and availability: 4.8★ from 3,718 Google reviews, open 24/7.

    • 4.8★ from 3,718 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    12 Cardinal Park Dr SE STE 107, Leesburg, VA 20175
    View profile for M.E. Flow(571) 322-8847

  16. #16 Smock Heating & Air

    Based in Frederick, 12 mi away

    88/100CR Score

    Ranked #16 because of its Google rating and trade focus: 5.0★ from 1,623 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 1,623 Google reviews
    Hours
    Mon–Sun 8 AM–8 PM
    Address
    1539 Tilco Dr Unit 104, Frederick, MD 21704
    View profile for Smock Heating & Air(301) 945-7220

  23. #23 Urbana HVAC

    Based in Ballenger Creek, 12 mi away

    88/100CR Score

    Ranked #23 because of its Google rating and availability: 5.0★ from 182 Google reviews, open 24/7.

    • 5.0★ from 182 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Urbana HVAC(240) 723-3860

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 635 ranked HVAC contractors here; the rest are on their profiles.

HVAC contractors in Damascus, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Warner Service884.8★ (537)13 mi
27Clarksburg Heating884.9★ (60)4 mi
28Frederick Air Inc884.8★ (414)13 mi
29P&Y Heating and Cooling885.0★ (85)9 mi
30Meade's Heating and Air885.0★ (710)23 mi
31John Nugent & Sons874.8★ (1,701)22 mi
32United Air Temp874.8★ (2,161)24 mi
33Tuckers Air Conditioning, Heating & Plumbing874.9★ (1,614)13 mi
34United Air Temp874.7★ (928)16 mi
35Environmental Systems Associates874.9★ (658)21 mi
36F.H. Furr Plumbing, Heating, Air Conditioning & Electrical874.7★ (1,847)20 mi
37Mario Bro, LLC875.0★ (53)9 mi
38May's Heating & Air Conditioning875.0★ (906)14 mi
39First Class Mechanical864.9★ (580)23 mi
40Wenbrooke Services AC Repair, Plumbing, Heating and Electrician865.0★ (111)15 mi
41Cardinal Plumbing Heating & Air Inc864.9★ (745)25 mi
42B&B Air Conditioning & Heating Service865.0★ (357)24 mi
43closed864.8★ (240)15 mi
44Wyant Service Experts864.8★ (165)13 mi
45Apple Plumbing, Heating, & Air864.9★ (679)25 mi
46NARFIX HEATING AND AIR CONDITIONING LLC865.0★ (293)23 mi
47Air 1 Mechanical Heating and Cooling864.9★ (440)22 mi
48Airtron Heating & Air Conditioning864.5★ (724)12 mi
49Simply Home Service865.0★ (184)8 mi
50AMS Air Conditioning & Heating864.9★ (116)15 mi

Also serving Damascus

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.

Unranked HVAC contractors serving Damascus
BusinessGoogle ratingDistance
A Blessing Mechanical, LLC5.0★ (2)13 mi
All American AC & HeatingIn Damascus
AM/PM Emergency Services a division of Robert E Clubb & Associates5.0★ (2)4 mi
Carey's Plumbing & Heating1.0★ (2)In Damascus
Davis Plumbing & Heating Inc5.0★ (2)14 mi
Farnen & Dermer4.8★ (931)24 mi
Home Services at The Home Depot3.5★ (2)7 mi
JC & JC HVAC4.7★ (503)18 mi
Lyons Plumbing4.8★ (89)In Damascus
M&G Home SolutionsIn Damascus
Maryland Plumbing, Heating & Cooling Contractors5.0★ (2)18 mi
Mayne Source Heating & Air5.0★ (2)9 mi
Mt Airy Heating & Air Conditioning5.0★ (2)7 mi
Owens & Johnsons Heating and Cooling3.0★ (2)15 mi
P W Scholl Plumbing & Heating Inc5.0★ (2)4 mi
Rockville Heating & Air Services5.0★ (2)12 mi
S.L. Johnson Plumbing & Heating3.0★ (2)14 mi
SERVPRO of Poolesville / Clarksburg / Damascus5.0★ (18)In Damascus
Triple E4.9★ (469)23 mi
Vito Services4.7★ (1,351)14 mi

How much do HVAC contractors cost in Damascus?

National price ranges in USD, not adjusted for Damascus. Each row names its basis and the month we checked it.

How much do HVAC contractors cost in Damascus?
JobLowTypicalHighBasisChecked
AC replacement$3,887$5,978$8,073Per system, installed (unit plus labor); typical range of customer-reported jobs. US national rangeOctober 2026
Furnace replacement$2,823$4,814$6,896Per system, installed; typical range of customer-reported jobs. US national rangeOctober 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.

  1. Check that the status is active and the name matches the contract or truck.
  2. 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 Damascus HVAC contractors

We scored 635 Damascus 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.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Damascus data
Reputation35%Bayesian-adjusted Google star ratingMeasured
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2Not yet collected
Review volume10%log10(reviews + 1) against the list maximumMeasured
Recency10%Share of reviews from the last 12 monthsNot yet collected
Availability10%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5Measured
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radiusMeasured
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)Measured

HVAC contractors in Damascus: frequently asked questions

Who is the best HVAC contractor in Damascus?

By CR Score, the highest-ranked HVAC contractor in Damascus, MD is GAC Services with a CR Score of 93/100. It has 4.9★ from 6,908 Google reviews. It is open 24/7. Presidential, Inc. (#2) and Michael Bonsby HVAC, Plumbing & Electrical (#3) follow. We ranked 635 HVAC contractors on 8 factors, last updated October 22, 2026.

How many HVAC contractors are there in Damascus?

ContractorsRanked ranks 635 HVAC contractors serving Damascus, MD. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.

Which HVAC contractors in Damascus are open 24/7?

185 ranked HVAC contractors in Damascus post 24/7 hours. The highest-ranked are GAC Services (#1), Presidential, Inc. (#2) and Michael Bonsby HVAC, Plumbing & Electrical (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which HVAC contractors in Damascus work on weekends?

396 of 635 ranked HVAC contractors post Saturday hours and 284 post Sunday hours. The highest-ranked open Saturdays are GAC Services (#1), Presidential, Inc. (#2) and Michael Bonsby HVAC, Plumbing & Electrical (#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 Damascus?

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 Damascus. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Damascus HVAC contractors have?

The median Google rating among 635 rated HVAC contractors in Damascus is 4.8★, with a median of 26 reviews. Len The Plumber Heating & Air, LLC has the most, 8,136 reviews, and ranks #24. 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 Damascus?

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 Damascus

  1. October 2026: CR Scores recalculated for 635 hvac contractors serving Damascus.
  2. October 2026: 1 duplicate listing merged.

More HVAC contractors and Damascus pages

Other trades in Damascus