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Emergency HVAC Contractors in White Oak, MD (2026)

Top 50 of 1,130 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 White Oak: Len The Plumber Heating & Air, LLC, 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 White Oak at a glance

Top emergency HVAC contractors in White Oak at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Len The Plumber Heating & Air, LLC664.6★ (8,136)Silver Spring, 2 mi away24/7
2GAC Services644.9★ (6,908)Gaithersburg, 12 mi away24/7
3F.H. Furr Plumbing, Heating, Air Conditioning & Electrical644.7★ (5,985)Rockville, 9 mi away24/7
4United Air Temp634.8★ (1,306)Greenbelt, 7 mi away24/7
5NARFIX HEATING AND AIR CONDITIONING LLC635.0★ (293)Silver Spring, 2 mi away24/7
6Michael & Son Services634.7★ (15,537)Alexandria, 19 mi away24/7
7CroppMetcalfe634.8★ (7,638)Fairfax, 17 mi away24/7
8Cyprus Air Heating, Cooling and Fireplaces624.7★ (1,402)Rockville, 8 mi away24/7
9Vito Services624.7★ (1,351)Rockville, 9 mi away24/7
10Presidential, Inc.624.9★ (1,701)Gaithersburg, 13 mi away24/7

Call an emergency HVAC contractor in White Oak 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 White Oak, 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 1,130 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, 12 mi away

    64/100CR 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 United Air Temp

    Based in Greenbelt, 7 mi away

    63/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.8★ from 1,306 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 1,306 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    7255 Hanover Pkwy Ste A, Greenbelt, MD 20770
    View profile for United Air Temp(240) 713-3314

  6. #6 Michael & Son Services

    Based in Alexandria, 19 mi away

    63/100CR Score

    Ranked #6 because of its Google rating and trade focus: 4.7★ from 15,537 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 15,537 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5740 General Washington Dr, Alexandria, VA 22312
    View profile for Michael & Son Services(800) 948-6453

  7. #7 CroppMetcalfe

    Based in Fairfax, 17 mi away

    63/100CR Score

    Ranked #7 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

  9. #9 Vito Services

    Based in Rockville, 9 mi away

    62/100CR Score

    Ranked #9 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

  10. #10 Presidential, Inc.

    Based in Gaithersburg, 13 mi away

    62/100CR Score

    Ranked #10 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

  12. #12 JC & JC HVAC

    Based in Silver Spring, 4 mi away

    62/100CR Score

    Ranked #12 because of its Google rating and trade focus: 4.7★ from 503 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 503 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1614 Maydale Dr, Silver Spring, MD 20905
    View profile for JC & JC HVAC(301) 364-3729

  15. #15 ARS / Rescue Rooter

    Based in Laurel, 11 mi away

    62/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.4★ from 3,510 Google reviews, listed on Google as “HVAC contractor”.

    • 4.4★ from 3,510 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    9010 Maier Rd # 105, Laurel, MD 20723
    View profile for ARS / Rescue Rooter(301) 276-4499

  17. #17 Thomas E Clark Inc

    Based in Silver Spring, 4 mi away

    62/100CR Score

    Ranked #17 because of its Google rating and trade focus: 4.8★ from 299 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 299 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2412 Linden Ln, Silver Spring, MD 20910
    View profile for Thomas E Clark Inc(301) 608-0550

  19. #19 JDL HVAC & Plumbing Services

    Based in Laurel, 8 mi away

    62/100CR Score

    Ranked #19 because of its Google rating and trade focus: 4.8★ from 678 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 678 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    14300 Cherry Lane Ct Ste 116, Laurel, MD 20707
    View profile for JDL HVAC & Plumbing Services

  20. #20 John C. Flood

    Based in Alexandria, 19 mi away

    62/100CR Score

    Ranked #20 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

  22. #22 Zapata’s HVAC Systems

    Based in Silver Spring, 1 mi away

    61/100CR Score

    Ranked #22 because of its Google rating and trade focus: 4.9★ from 107 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 107 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    12001 Old Columbia Pike unit g2, Silver Spring, MD 20904
    View profile for Zapata’s HVAC Systems(202) 480-7527

  25. #25 United Air Temp

    Based in Fort Washington, 16 mi away

    61/100CR Score

    Ranked #25 because of its Google rating and trade focus: 4.8★ from 1,775 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 1,775 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5620 St Barnabas Rd Ste 240, Fort Washington, MD 20744
    View profile for United Air Temp(240) 342-3956

Top 50 of 1,130 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 White Oak, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26One Hour Air Conditioning & Heating® of Gaithersburg614.8★ (302)7 mi
27Beltway Air Conditioning, Heating & Plumbing614.9★ (2,167)19 mi
28Krafft Service Corporation614.9★ (1,631)18 mi
29AZA heating, cooling, plumbing & construction615.0★ (959)17 mi
30Belair Engineering and Service Company, Inc.614.9★ (1,421)18 mi
31Grove Heating & Cooling614.9★ (1,156)17 mi
32Cool Breeze Plumbing, Heating & A/C614.8★ (666)13 mi
33Cycle Heating and Cooling, LLC614.9★ (77)3 mi
34Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical614.8★ (4,514)24 mi
35Cardinal Plumbing Heating & Air Inc604.9★ (2,958)23 mi
36Shemtov Systems Heating & Air Conditioning604.9★ (57)2 mi
37Snell Home Services604.8★ (5,283)25 mi
38AMS Air Conditioning & Heating604.9★ (116)7 mi
39AllTech Services, Inc604.9★ (2,807)25 mi
40Caffi Services604.9★ (508)16 mi
41Meade's Heating and Air605.0★ (1,428)22 mi
42F.H. Furr Plumbing, Heating, Air Conditioning & Electrical604.7★ (4,469)24 mi
43Metro Services HVAC604.9★ (298)13 mi
44Nero's Heating and Air604.9★ (166)10 mi
45United Air Temp604.8★ (1,318)20 mi
46AVS Heating and Air Conditioning Bethesda - Appliance, Heating, AC Install, Repair Maintenance Service604.8★ (104)7 mi
47Su' Coy Heating, AC & Duct Cleaning604.9★ (205)11 mi
48C.D. Shanahan's HVAC, Plumbing, Electrical & Remodeling LLC604.9★ (966)20 mi
49EzGreen Air Duct And Dryer Vent Cleaning604.9★ (90)7 mi
50Michael & Son Services604.9★ (1,501)23 mi

How we ranked emergency HVAC contractors in White Oak

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 White Oak: questions

Which HVAC contractors in White Oak are open 24/7?

25 on this list post 24/7 hours, including Len The Plumber Heating & Air, LLC, GAC Services, F.H. Furr Plumbing, Heating, Air Conditioning & Electrical, United Air Temp and NARFIX HEATING AND AIR CONDITIONING LLC.

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

Len The Plumber Heating & Air, LLC is #1, with a CR Score of 66 out of 100 on emergency weights.

How are emergency HVAC contractors in White Oak 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?

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

Update log for White Oak

  1. October 2026: CR Scores recalculated for 1,130 hvac contractors serving White Oak.
  2. October 2026: 11 duplicate listings merged.

More emergency and heating and cooling pages