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Emergency HVAC Contractors in Damascus, MD (2026)

Top 50 of 608 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank

25 of the 50 HVAC contractors on this list post 24/7 hours. 24/7 businesses come first, then same-day, each ranked by CR Score with availability weighted higher.

If you smell gas, leave the building now and call your gas utility or 911 from outside.

The short answer

  1. 1

    #1 for emergency heating and cooling in Damascus: GAC Services, open 24/7.

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

Top emergency HVAC contractors in Damascus at a glance

Top emergency HVAC contractors in Damascus at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1GAC Services944.9★ (6,908)Gaithersburg, 11 mi away24/7
2Presidential, Inc.924.9★ (1,701)Gaithersburg, 8 mi away24/7
3Michael Bonsby HVAC, Plumbing & Electrical924.8★ (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 & Electrical914.7★ (5,985)Rockville, 14 mi away24/7
6One Hour Air Conditioning & Heating® of Mount Airy904.7★ (852)Mount Airy, 7 mi away24/7
7Cool Breeze Plumbing, Heating & A/C904.8★ (666)Gaithersburg, 9 mi away24/7
8Wenbrooke Services - Electrical, Plumbing, Heating and Air904.8★ (1,208)Frederick, 13 mi away24/7
9Prestige Home Services895.0★ (61)Clarksburg, 1 mi away24/7
10Larry & Sons Plumbing, Heating, Cooling, Drain & Electrical894.8★ (932)Frederick, 14 mi away24/7

Call an emergency HVAC contractor in Damascus now

24/7 hours mean the business says its phone is answered around the clock. Arrival time depends on where the crew is. Ask for an arrival window when you call.

The 50 emergency HVAC contractors in Damascus, ranked

24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights. The full ranking of all 608 is on the HVAC contractors page.

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

    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
    View profile for GAC Services(301) 202-1641

  11. #11 Vito Services

    Based in Rockville, 14 mi away

    89/100CR Score

    Ranked #11 because of its Google rating and availability: 4.7★ from 1,351 Google reviews, open 24/7.

    • 4.7★ from 1,351 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    681 Southlawn Ln, Rockville, MD 20850
    View profile for Vito Services(301) 861-3908

  16. #16 M.E. Flow

    Based in Leesburg, 22 mi away

    89/100CR Score

    Ranked #16 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

  23. #23 Warner Service

    Based in Frederick, 13 mi away

    89/100CR Score

    Ranked #23 because of its Google rating and availability: 4.8★ from 537 Google reviews, open 24/7.

    • 4.8★ from 537 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    217 Monroe Ave, Frederick, MD 21701
    View profile for Warner Service(301) 200-9774

Top 50 of 608 HVAC contractors by emergency score

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile.

HVAC contractors in Damascus, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Urbana HVAC885.0★ (182)12 mi
27Clarksburg Heating884.9★ (60)4 mi
28Frederick Air Inc884.8★ (414)13 mi
29John Nugent & Sons884.8★ (1,701)22 mi
30P&Y Heating and Cooling885.0★ (85)9 mi
31United Air Temp884.7★ (928)16 mi
32F.H. Furr Plumbing, Heating, Air Conditioning & Electrical884.7★ (1,847)20 mi
33United Air Temp884.8★ (2,161)24 mi
34Meade's Heating and Air885.0★ (710)23 mi
35Airtron Heating & Air Conditioning874.5★ (724)12 mi
36Environmental Systems Associates874.9★ (658)21 mi
37Mario Bro, LLC875.0★ (53)9 mi
38closed874.8★ (240)15 mi
39First Class Mechanical874.9★ (580)23 mi
40Wyant Service Experts874.8★ (165)13 mi
41Wenbrooke Services AC Repair, Plumbing, Heating and Electrician875.0★ (111)15 mi
42JC & JC HVAC874.7★ (503)18 mi
43Cardinal Plumbing Heating & Air Inc874.9★ (745)25 mi
44Apple Plumbing, Heating, & Air864.9★ (679)25 mi
45Air 1 Mechanical Heating and Cooling864.9★ (440)22 mi
46B&B Air Conditioning & Heating Service865.0★ (357)24 mi
47Farnen & Dermer864.8★ (931)24 mi
48AMS Air Conditioning & Heating864.9★ (116)15 mi
49NARFIX HEATING AND AIR CONDITIONING LLC865.0★ (293)23 mi
50Triple E864.9★ (469)23 mi

How we ranked emergency HVAC contractors in Damascus

Emergency lists move 10 points of the CR Score from reputation to availability: 25% and 20%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

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 from
Reputation25%Bayesian-adjusted Google star rating
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2
Review volume10%log10(reviews + 1) against the list maximum
Recency10%Share of reviews from the last 12 months
Availability20%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radius
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)

Emergency HVAC contractors in Damascus: questions

Which HVAC contractors in Damascus are open 24/7?

25 on this list post 24/7 hours, including GAC Services, Presidential, Inc., Michael Bonsby HVAC, Plumbing & Electrical, Parker Pearce Service Experts and F.H. Furr Plumbing, Heating, Air Conditioning & Electrical.

Who is ranked #1 for emergency heating and cooling in Damascus, MD?

GAC Services is #1, with a CR Score of 94 out of 100 on emergency weights.

How are emergency HVAC contractors in Damascus ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 25% and 20%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

What should I do before the HVAC contractor arrives?

If you smell gas, leave the building now and call your gas utility or 911 from outside.

How many emergency HVAC contractors here list a phone number?

25 of the 25 businesses ranked in full list a phone number. Tap Call to dial it.

Update log for Damascus

  1. October 2026: CR Scores recalculated for 608 hvac contractors serving Damascus.
  2. October 2026: 1 duplicate listing merged.

More emergency and heating and cooling pages