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Emergency HVAC Contractors in Germantown, MD (2026)

Top 50 of 827 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 Germantown: 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 Germantown at a glance

Top emergency HVAC contractors in Germantown at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1GAC Services954.9★ (6,908)Gaithersburg, 6 mi away24/7
2Presidential, Inc.934.9★ (1,701)Gaithersburg, 6 mi away24/7
3F.H. Furr Plumbing, Heating, Air Conditioning & Electrical934.7★ (5,985)Rockville, 9 mi away24/7
4Michael Bonsby HVAC, Plumbing & Electrical924.8★ (2,083)Gaithersburg, 6 mi away24/7
5Parker Pearce Service Experts924.8★ (1,700)Gaithersburg, 6 mi away24/7
6Meade's Heating and Air915.0★ (1,428)Sterling, 13 mi away24/7
7Cardinal Plumbing Heating & Air Inc914.9★ (2,958)Sterling, 15 mi away24/7
8Making Air Right914.9★ (361)Clarksburg, 3 mi away24/7
9Snell Home Services914.8★ (5,283)Sterling, 16 mi away24/7
10AllTech Services, Inc914.9★ (2,807)Sterling, 16 mi away24/7

Call an emergency HVAC contractor in Germantown 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 Germantown, 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 827 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 Germantown

    #1 GAC Services

    Based in Gaithersburg, 6 mi away

    95/100CR 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

  13. #13 M.E. Flow

    Based in Leesburg, 15 mi away

    91/100CR Score

    Ranked #13 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

  14. #14 CroppMetcalfe

    Based in Fairfax, 21 mi away

    90/100CR Score

    Ranked #14 because of its Google rating and availability: 4.8★ from 7,638 Google reviews, open 24/7.

    • 4.8★ from 7,638 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    8421 Hilltop Rd, Fairfax, VA 22031
    View profile for CroppMetcalfe(703) 420-5030

  17. #17 Vito Services

    Based in Rockville, 9 mi away

    90/100CR Score

    Ranked #17 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

  21. #21 United Air Temp

    Based in Sterling, 15 mi away

    90/100CR Score

    Ranked #21 because of its Google rating and availability: 4.8★ from 2,161 Google reviews, open 24/7.

    • 4.8★ from 2,161 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    45570 Shepard Dr Ste. #6, Sterling, VA 20164
    View profile for United Air Temp(571) 888-8078

Top 50 of 827 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 Germantown, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26OHA HVAC, Plumbing, Chimney & Fireplaces894.9★ (1,794)21 mi
27P&Y Heating and Cooling895.0★ (85)5 mi
28Air 1 Mechanical Heating and Cooling894.9★ (440)14 mi
29B&B Air Conditioning & Heating Service895.0★ (357)15 mi
30Larry & Sons Plumbing, Heating, Cooling, Drain & Electrical884.8★ (932)17 mi
31One Hour Air Conditioning & Heating® of Mount Airy884.7★ (852)15 mi
32Mario Bro, LLC885.0★ (53)5 mi
33United Air Temp884.7★ (75)3 mi
34Markool Heating Cooling Plumbing884.9★ (547)18 mi
35Pro Sky Services885.0★ (484)20 mi
36Premier HVAC LLC885.0★ (230)16 mi
37Nelson's HVAC, LLC874.9★ (627)20 mi
38United Air Temp874.7★ (928)18 mi
39AMS Air Conditioning & Heating874.9★ (116)11 mi
40Clover Contracting: Plumbing, HVAC & Air Purification874.9★ (156)13 mi
41Michael & Son Services874.7★ (419)14 mi
42Premier Home Comfort875.0★ (226)17 mi
43Prestige Home Services875.0★ (61)9 mi
44Vernon The Heating & Cooling Specialist874.8★ (837)21 mi
45Warner Service874.8★ (537)18 mi
46NARFIX HEATING AND AIR CONDITIONING LLC875.0★ (293)19 mi
47Urbana HVAC875.0★ (182)16 mi
48Frederick Air Inc874.8★ (414)17 mi
49JC & JC HVAC874.7★ (503)17 mi
50Abdul HVAC875.0★ (34)7 mi

How we ranked emergency HVAC contractors in Germantown

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 Germantown: questions

Which HVAC contractors in Germantown are open 24/7?

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

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

GAC Services is #1, with a CR Score of 95 out of 100 on emergency weights.

How are emergency HVAC contractors in Germantown 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 Germantown

  1. October 2026: CR Scores recalculated for 827 hvac contractors serving Germantown.
  2. October 2026: 4 duplicate listings merged.

More emergency and heating and cooling pages