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ContractorsRanked

Emergency HVAC Contractors in Frederick, MD (2026)

Top 50 of 267 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 Frederick: Wenbrooke Services - Electrical, Plumbing, Heating and Air, 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 Frederick at a glance

Top emergency HVAC contractors in Frederick at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Wenbrooke Services - Electrical, Plumbing, Heating and Air934.8★ (1,208)Frederick24/7
2Larry & Sons Plumbing, Heating, Cooling, Drain & Electrical934.8★ (932)Frederick24/7
3Markool Heating Cooling Plumbing934.9★ (547)Frederick24/7
4United Air Temp924.7★ (928)Frederick24/7
5Warner Service924.8★ (537)Frederick24/7
6Frederick Air Inc924.8★ (414)Frederick24/7
7Urbana HVAC915.0★ (182)Ballenger Creek, 2 mi away24/7
8Airtron Heating & Air Conditioning914.5★ (724)Frederick24/7
9Wenbrooke Services AC Repair, Plumbing, Heating and Electrician915.0★ (111)Frederick24/7
10GAC Services914.9★ (6,908)Gaithersburg, 23 mi away24/7

Call an emergency HVAC contractor in Frederick 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 Frederick, 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 267 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.

  4. #4 United Air Temp

    Based in Frederick

    92/100CR Score

    Ranked #4 because of its Google rating and availability: 4.7★ from 928 Google reviews, open 24/7.

    • 4.7★ from 928 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5305 Jefferson Pike Suite 5, Frederick, MD 21703
    View profile for United Air Temp(240) 680-9304

  5. #5 Warner Service

    Based in Frederick

    92/100CR Score

    Ranked #5 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

  7. #7 Urbana HVAC

    Based in Ballenger Creek, 2 mi away

    91/100CR Score

    Ranked #7 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

  10. #10 GAC Services

    Based in Gaithersburg, 23 mi away

    91/100CR Score

    Ranked #10 because of its Google rating and review volume: 4.9★ from 6,908 Google reviews, 6,908 Google reviews.

    • 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 closed

    Based in Walkersville, 2 mi away

    91/100CR Score

    Ranked #11 because of its Google rating and availability: 4.8★ from 240 Google reviews, open 24/7.

    • 4.8★ from 240 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for closed(301) 900-8593

  14. #14 M.E. Flow

    Based in Leesburg, 23 mi away

    89/100CR Score

    Ranked #14 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

  15. #15 Presidential, Inc.

    Based in Gaithersburg, 21 mi away

    89/100CR Score

    Ranked #15 because of its Google rating and availability: 4.9★ from 1,701 Google reviews, open 24/7.

    • 4.9★ from 1,701 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    8000 Cessna Ave, Gaithersburg, MD 20879
    View profile for Presidential, Inc.(301) 719-3315

Top 50 of 267 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 Frederick, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Homeland Heating and Air Conditioning875.0★ (25)6 mi
27Right-A-Way Heating & Cooling865.0★ (17)In Frederick
28Cumberland Valley Heating & Air Conditioning864.9★ (441)24 mi
29Michael & Son Services864.0★ (88)In Frederick
30Prestige Home Services865.0★ (61)14 mi
31Metro Services HVAC864.9★ (298)22 mi
32Tim Kyle Electric, Heating & Cooling855.0★ (2,777)25 mi
33Clarksburg Heating854.9★ (60)16 mi
34McIntire HVAC854.9★ (160)22 mi
35P&Y Heating and Cooling855.0★ (85)21 mi
36Akron Industrial Heating & Cooling854.5★ (8)In Frederick
37B & E Services844.9★ (154)25 mi
38Fire n Ice Hvac, Inc845.0★ (90)24 mi
39Mario Bro, LLC845.0★ (53)21 mi
40ClemAIR Heating & Cooling, LLC845.0★ (9)7 mi
41Right A Way Heating & Cooling845.0★ (3)6 mi
42United Air Temp834.7★ (75)21 mi
43Precision Heating & Cooling, Inc.832.8★ (12)In Frederick
44M&M Welding and Fabricators, Inc.834.7★ (12)15 mi
45Griffith Energy Services, Inc.834.4★ (147)22 mi
46Skyline Heating and Air835.0★ (30)23 mi
47Abdul HVAC825.0★ (34)24 mi
48Forever Air Duct Cleaning825.0★ (6)11 mi
49Apple Plumbing, Heating, & Air815.0★ (216)25 mi
50Constellation Home814.8★ (93)6 mi

How we ranked emergency HVAC contractors in Frederick

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 Frederick: questions

Which HVAC contractors in Frederick are open 24/7?

25 on this list post 24/7 hours, including Wenbrooke Services - Electrical, Plumbing, Heating and Air, Larry & Sons Plumbing, Heating, Cooling, Drain & Electrical, Markool Heating Cooling Plumbing, United Air Temp and Warner Service.

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

Wenbrooke Services - Electrical, Plumbing, Heating and Air is #1, with a CR Score of 93 out of 100 on emergency weights.

How are emergency HVAC contractors in Frederick 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 Frederick

  1. October 2026: CR Scores recalculated for 267 hvac contractors serving Frederick.

More emergency and heating and cooling pages