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Emergency HVAC Contractors in Poolesville, MD (2026)

Top 50 of 633 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 Poolesville: 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 Poolesville at a glance

Top emergency HVAC contractors in Poolesville at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1GAC Services654.9★ (6,908)Gaithersburg, 13 mi away24/7
2M.E. Flow654.8★ (3,718)Leesburg, 8 mi away24/7
3F.H. Furr Plumbing, Heating, Air Conditioning & Electrical654.8★ (2,314)Ashburn, 7 mi away24/7
4Snell Home Services654.8★ (5,283)Sterling, 12 mi away24/7
5Cardinal Plumbing Heating & Air Inc644.9★ (2,958)Sterling, 11 mi away24/7
6Meade's Heating and Air645.0★ (1,428)Sterling, 9 mi away24/7
7AllTech Services, Inc644.9★ (2,807)Sterling, 11 mi away24/7
8John Nugent & Sons644.8★ (1,701)Sterling, 9 mi away24/7
9Michael & Son Services644.9★ (1,501)Sterling, 9 mi away24/7
10United Air Temp644.8★ (2,161)Sterling, 11 mi away24/7

Call an emergency HVAC contractor in Poolesville 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 Poolesville, 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 633 is on the HVAC contractors page.

Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  1. Ranked #1 in Poolesville

    #1 GAC Services

    Based in Gaithersburg, 13 mi away

    65/100CR Score

    Ranked #1 because of its Google rating and trade focus: 4.9★ from 6,908 Google reviews, listed on Google as “Heating contractor”.

    • 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

  2. #2 M.E. Flow

    Based in Leesburg, 8 mi away

    65/100CR Score

    Ranked #2 because of its Google rating and trade focus: 4.8★ from 3,718 Google reviews, listed on Google as “HVAC contractor”.

    • 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

  4. #4 Snell Home Services

    Based in Sterling, 12 mi away

    65/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.8★ from 5,283 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 5,283 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    22977 Eaglewood Ct STE 130, Sterling, VA 20166
    View profile for Snell Home Services(571) 470-7206

  7. #7 AllTech Services, Inc

    Based in Sterling, 11 mi away

    64/100CR Score

    Ranked #7 because of its Google rating and trade focus: 4.9★ from 2,807 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 2,807 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    101-A Executive Dr STE 200, Sterling, VA 20166
    View profile for AllTech Services, Inc(703) 214-2940

  8. #8 John Nugent & Sons

    Based in Sterling, 9 mi away

    64/100CR Score

    Ranked #8 because of its Google rating and trade focus: 4.8★ from 1,701 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 1,701 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    45921 Maries Rd, Sterling, VA 20166
    View profile for John Nugent & Sons(571) 506-5228

  10. #10 United Air Temp

    Based in Sterling, 11 mi away

    64/100CR Score

    Ranked #10 because of its Google rating and trade focus: 4.8★ from 2,161 Google reviews, listed on Google as “HVAC contractor”.

    • 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

  13. #13 Presidential, Inc.

    Based in Gaithersburg, 14 mi away

    63/100CR Score

    Ranked #13 because of its Google rating and trade focus: 4.9★ from 1,701 Google reviews, listed on Google as “HVAC contractor”.

    • 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

  15. #15 CroppMetcalfe

    Based in Fairfax, 21 mi away

    63/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.8★ from 7,638 Google reviews, listed on Google as “HVAC contractor”.

    • 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

  25. #25 Vito Services

    Based in Rockville, 15 mi away

    61/100CR Score

    Ranked #25 because of its Google rating and trade focus: 4.7★ from 1,351 Google reviews, listed on Google as “HVAC contractor”.

    • 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

Top 50 of 633 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 Poolesville, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Clover Contracting: Plumbing, HVAC & Air Purification614.9★ (156)7 mi
27Vernon The Heating & Cooling Specialist614.8★ (837)15 mi
28Cool Breeze Plumbing, Heating & A/C614.8★ (666)14 mi
29OHA HVAC, Plumbing, Chimney & Fireplaces614.9★ (1,794)21 mi
30Premier Home Comfort615.0★ (226)12 mi
31Larry & Sons Plumbing, Heating, Cooling, Drain & Electrical614.8★ (932)17 mi
32Metro Services HVAC614.9★ (298)12 mi
33Markool Heating Cooling Plumbing614.9★ (547)17 mi
34Premier HVAC LLC615.0★ (230)13 mi
35United Air Temp614.7★ (928)17 mi
36Cube Heating & Cooling605.0★ (96)10 mi
37Nelson's HVAC, LLC604.9★ (627)20 mi
38R A Dobson Inc604.8★ (164)11 mi
39Airtron Heating & Air Conditioning604.5★ (724)16 mi
40Dave's Heating & Air Conditioning604.8★ (138)11 mi
41Michael & Son Services604.8★ (993)22 mi
42Warner Service604.8★ (537)19 mi
43Frederick Air Inc594.8★ (414)18 mi
44One Hour Air Conditioning & Heating® of Mount Airy594.7★ (852)21 mi
45Urbana HVAC595.0★ (182)17 mi
46P&Y Heating and Cooling595.0★ (85)13 mi
47911Air-Care595.0★ (81)12 mi
48Fairfax Cooling & Heating Company594.7★ (106)11 mi
49Sultan Comfort Solutions595.0★ (147)17 mi
50United Air Temp594.7★ (75)10 mi

How we ranked emergency HVAC contractors in Poolesville

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. 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
Reputation15%Google star rating, adjusted for how many reviews back it
Credentials15%Active state license, bond and workers’ comp on file
Review volume10%Number of Google reviews, compared with the most-reviewed business on the list
Recency5%Share of reviews from the last 12 months
Availability15%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%How clearly the business does this trade (its Google category and name)
Proximity5%Based in the city scores highest, less the farther away it is
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodically
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there are

Emergency HVAC contractors in Poolesville: questions

Which HVAC contractors in Poolesville are open 24/7?

25 on this list post 24/7 hours, including GAC Services, M.E. Flow, F.H. Furr Plumbing, Heating, Air Conditioning & Electrical, Snell Home Services and Cardinal Plumbing Heating & Air Inc.

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

GAC Services is #1, with a CR Score of 65 out of 100 on emergency weights.

How are emergency HVAC contractors in Poolesville ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. 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 Poolesville

  1. October 2026: CR Scores recalculated for 633 hvac contractors serving Poolesville.
  2. October 2026: 3 duplicate listings merged.

More emergency and heating and cooling pages