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Emergency HVAC Contractors in Maryland City, MD (2026)

Top 50 of 963 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 Maryland City: ARS / Rescue Rooter, 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 Maryland City at a glance

Top emergency HVAC contractors in Maryland City at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1ARS / Rescue Rooter644.4★ (3,510)Laurel, 2 mi away24/7
2Beltway Air Conditioning, Heating & Plumbing644.9★ (2,167)Hanover, 9 mi away24/7
3Len The Plumber Heating & Air, LLC634.6★ (8,136)Silver Spring, 12 mi away24/7
4JDL HVAC & Plumbing Services634.8★ (678)Laurel, 2 mi away24/7
5Environmental Systems Associates634.9★ (658)Columbia, 5 mi away24/7
6United Air Temp634.8★ (1,306)Greenbelt, 8 mi away24/7
7Grove Heating & Cooling634.9★ (1,156)Crofton, 10 mi away24/7
8GAC Services624.9★ (6,908)Gaithersburg, 20 mi away24/7
9Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical624.8★ (4,514)Baltimore, 17 mi away24/7
10F.H. Furr Plumbing, Heating, Air Conditioning & Electrical624.7★ (5,985)Rockville, 17 mi away24/7

Call an emergency HVAC contractor in Maryland City 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 Maryland City, 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 963 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 Maryland City

    #1 ARS / Rescue Rooter

    Based in Laurel, 2 mi away

    64/100CR Score

    Ranked #1 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

  4. #4 JDL HVAC & Plumbing Services

    Based in Laurel, 2 mi away

    63/100CR Score

    Ranked #4 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

  6. #6 United Air Temp

    Based in Greenbelt, 8 mi away

    63/100CR Score

    Ranked #6 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

  8. #8 GAC Services

    Based in Gaithersburg, 20 mi away

    62/100CR Score

    Ranked #8 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

  16. #16 JC & JC HVAC

    Based in Silver Spring, 9 mi away

    61/100CR Score

    Ranked #16 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

  17. #17 United Air Temp

    Based in Jessup, 4 mi away

    61/100CR Score

    Ranked #17 because of its Google rating and trade focus: 4.8★ from 171 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 171 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    8017 Dorsey Run Rd Suite G, Jessup, MD 20794
    View profile for United Air Temp(410) 834-1235

  19. #19 Ambient LLC

    Based in Severn, 9 mi away

    61/100CR Score

    Ranked #19 because of its Google rating and trade focus: 4.8★ from 336 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 336 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    508 Shaw Ct #103, Severn, MD 21144
    View profile for Ambient LLC(410) 429-7280

  22. #22 Presidential, Inc.

    Based in Gaithersburg, 19 mi away

    61/100CR Score

    Ranked #22 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

  23. #23 ROCKY LLC

    Based in Severn, 6 mi away

    61/100CR Score

    Ranked #23 because of its Google rating and trade focus: 4.6★ from 253 Google reviews, listed on Google as “HVAC contractor”.

    • 4.6★ from 253 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    7939 Citadel Dr, Severn, MD 21144
    View profile for ROCKY LLC(410) 446-2401

Top 50 of 963 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 Maryland City, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Len The Plumber Heating & Air, LLC614.7★ (15,911)14 mi
27Michael Bonsby HVAC, Plumbing & Electrical614.8★ (2,083)19 mi
28Bethany Air604.8★ (1,251)18 mi
29Parker Pearce Service Experts604.8★ (1,700)19 mi
30Complete Climate Services LLC605.0★ (786)18 mi
31Cyprus Air Heating, Cooling and Fireplaces604.7★ (1,402)17 mi
32Greenfox Cooling, Heating & Plumbing604.8★ (238)10 mi
33Magnolia Plumbing, Heating & Cooling604.4★ (1,519)14 mi
34THE ELECTRICIANS604.9★ (98)6 mi
35Vito Services604.7★ (1,351)17 mi
36Arundel Service Experts604.7★ (472)13 mi
37JJ HEATING & COOLING COMPANY604.8★ (110)6 mi
38Sila Heating, Air Conditioning & Plumbing604.9★ (275)13 mi
39United Air Temp604.8★ (1,775)21 mi
40C&V Home Services Inc604.9★ (114)9 mi
41JLOH Heating & Cooling services LLC.605.0★ (26)1 mi
42EzGreen Air duct And Dryer Vent Cleaning604.9★ (130)10 mi
43Fresh Air Concepts, LLC604.9★ (217)12 mi
44Len The Plumber Heating & Air, LLC604.8★ (1,053)5 mi
45One Hour Air Conditioning & Heating® of Gaithersburg604.8★ (302)13 mi
46Zapata’s HVAC Systems604.9★ (107)9 mi
47Michael & Son Services594.7★ (419)14 mi
48Thomas E Clark Inc594.8★ (299)14 mi
49Tim Whistler Plumbing, Gas Fitting, HVAC, and Electrical594.8★ (291)14 mi
50One Hour Air Conditioning & Heating® of Annapolis594.8★ (367)15 mi

How we ranked emergency HVAC contractors in Maryland City

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 Maryland City: questions

Which HVAC contractors in Maryland City are open 24/7?

25 on this list post 24/7 hours, including ARS / Rescue Rooter, Beltway Air Conditioning, Heating & Plumbing, Len The Plumber Heating & Air, LLC, JDL HVAC & Plumbing Services and Environmental Systems Associates.

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

ARS / Rescue Rooter is #1, with a CR Score of 64 out of 100 on emergency weights.

How are emergency HVAC contractors in Maryland City 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 Maryland City

  1. October 2026: CR Scores recalculated for 963 hvac contractors serving Maryland City.
  2. October 2026: 5 duplicate listings merged.

More emergency and heating and cooling pages