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Emergency HVAC Contractors in Rockville, MD (2026)

Top 50 of 1,065 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 Rockville: F.H. Furr Plumbing, Heating, Air Conditioning & Electrical, 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 Rockville at a glance

Top emergency HVAC contractors in Rockville at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1F.H. Furr Plumbing, Heating, Air Conditioning & Electrical664.7★ (5,985)Rockville24/7
2GAC Services664.9★ (6,908)Gaithersburg, 4 mi away24/7
3Cyprus Air Heating, Cooling and Fireplaces654.7★ (1,402)Rockville24/7
4Vito Services654.7★ (1,351)Rockville24/7
5Len The Plumber Heating & Air, LLC644.6★ (8,136)Silver Spring, 9 mi away24/7
6Presidential, Inc.644.9★ (1,701)Gaithersburg, 6 mi away24/7
7Michael Bonsby HVAC, Plumbing & Electrical644.8★ (2,083)Gaithersburg, 6 mi away24/7
8Parker Pearce Service Experts644.8★ (1,700)Gaithersburg, 6 mi away24/7
9CroppMetcalfe634.8★ (7,638)Fairfax, 15 mi away24/7
10Michael & Son Services634.7★ (15,537)Alexandria, 20 mi away24/7

Call an emergency HVAC contractor in Rockville 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 Rockville, 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 1,065 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.

  2. #2 GAC Services

    Based in Gaithersburg, 4 mi away

    66/100CR Score

    Ranked #2 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

  4. #4 Vito Services

    Based in Rockville

    65/100CR Score

    Ranked #4 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

  6. #6 Presidential, Inc.

    Based in Gaithersburg, 6 mi away

    64/100CR Score

    Ranked #6 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

  9. #9 CroppMetcalfe

    Based in Fairfax, 15 mi away

    63/100CR Score

    Ranked #9 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

  13. #13 Snell Home Services

    Based in Sterling, 17 mi away

    62/100CR Score

    Ranked #13 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

  15. #15 Metro Services HVAC

    Based in Gaithersburg, 5 mi away

    62/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.9★ from 298 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 298 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    30 N Summit Ave Unit 2, Gaithersburg, MD 20877
    View profile for Metro Services HVAC(240) 676-1804

  16. #16 AllTech Services, Inc

    Based in Sterling, 17 mi away

    62/100CR Score

    Ranked #16 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

  19. #19 John C. Flood

    Based in Alexandria, 20 mi away

    62/100CR Score

    Ranked #19 because of its Google rating and trade focus: 4.8★ from 4,976 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 4,976 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    6430 General Green Way, Alexandria, VA 22312
    View profile for John C. Flood(571) 605-7008

  21. #21 John Nugent & Sons

    Based in Sterling, 15 mi away

    62/100CR Score

    Ranked #21 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

  22. #22 Michael & Son Services

    Based in Sterling, 15 mi away

    62/100CR Score

    Ranked #22 because of its Google rating and trade focus: 4.9★ from 1,501 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 1,501 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    45681 Oakbrook Ct STE 101, Sterling, VA 20166
    View profile for Michael & Son Services(703) 289-0565

  23. #23 United Air Temp

    Based in Sterling, 16 mi away

    62/100CR Score

    Ranked #23 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

Top 50 of 1,065 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 Rockville, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Thomas E Clark Inc614.8★ (299)8 mi
27M.E. Flow614.8★ (3,718)21 mi
28Tim Whistler Plumbing, Gas Fitting, HVAC, and Electrical614.8★ (291)8 mi
29NARFIX HEATING AND AIR CONDITIONING LLC615.0★ (293)11 mi
30JC & JC HVAC614.7★ (503)10 mi
31Cardinal Plumbing Heating & Air Inc614.9★ (745)15 mi
32Krafft Service Corporation614.9★ (1,631)19 mi
33United Air Temp614.8★ (1,306)16 mi
34AZA heating, cooling, plumbing & construction615.0★ (959)18 mi
35Magnolia Plumbing, Heating & Cooling614.4★ (1,519)12 mi
36Nelson's HVAC, LLC604.9★ (627)15 mi
37P&Y Heating and Cooling605.0★ (85)6 mi
38ARS / Rescue Rooter604.4★ (3,510)18 mi
39Meade's Heating and Air605.0★ (710)18 mi
40JDL HVAC & Plumbing Services604.8★ (678)16 mi
41Air 1 Mechanical Heating and Cooling604.9★ (440)15 mi
42C.D. Shanahan's HVAC, Plumbing, Electrical & Remodeling LLC604.9★ (966)20 mi
43United Air Temp604.8★ (1,775)21 mi
44B&B Air Conditioning & Heating Service605.0★ (357)16 mi
45Environmental Systems Associates604.9★ (658)18 mi
46F.H. Furr Plumbing, Heating, Air Conditioning & Electrical604.7★ (4,469)25 mi
47AVS Heating and Air Conditioning Bethesda - Appliance, Heating, AC Install, Repair Maintenance Service604.8★ (104)7 mi
48Abdul HVAC605.0★ (34)3 mi
49United Air Temp604.8★ (1,318)21 mi
50Mario Bro, LLC605.0★ (53)6 mi

How we ranked emergency HVAC contractors in Rockville

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 Rockville: questions

Which HVAC contractors in Rockville are open 24/7?

25 on this list post 24/7 hours, including F.H. Furr Plumbing, Heating, Air Conditioning & Electrical, GAC Services, Cyprus Air Heating, Cooling and Fireplaces, Vito Services and Len The Plumber Heating & Air, LLC.

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

F.H. Furr Plumbing, Heating, Air Conditioning & Electrical is #1, with a CR Score of 66 out of 100 on emergency weights.

How are emergency HVAC contractors in Rockville 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 Rockville

  1. October 2026: CR Scores recalculated for 1,065 hvac contractors serving Rockville.
  2. October 2026: 7 duplicate listings merged.

More emergency and heating and cooling pages