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Emergency HVAC Contractors in Greater Upper Marlboro, MD (2026)

Top 50 of 743 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 Greater Upper Marlboro: Belair Engineering and Service Company, Inc., 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 Greater Upper Marlboro at a glance

Top emergency HVAC contractors in Greater Upper Marlboro at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Belair Engineering and Service Company, Inc.934.9★ (1,421)Greater Upper Marlboro24/7
2Fixed Right & Guaranteed Super Techs, LLC905.0★ (1,032)Rosaryville, 11 mi away24/7
3Grove Heating & Cooling904.9★ (1,156)Crofton, 11 mi away24/7
4Staton Heating, Cooling & Plumbing904.9★ (2,904)Annapolis, 16 mi away24/7
5United Air Temp904.8★ (1,775)Fort Washington, 12 mi away24/7
6TRINITY PRO SERVICES904.7★ (257)Greater Upper Marlboro24/7
7United Air Temp894.8★ (146)Greater Upper Marlboro24/7
8Michael & Son Services894.7★ (15,537)Alexandria, 23 mi away24/7
9Bethany Air894.8★ (1,251)Edgewater, 12 mi away24/7
10United Air Temp894.8★ (1,306)Greenbelt, 13 mi away24/7

Call an emergency HVAC contractor in Greater Upper Marlboro 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 Greater Upper Marlboro, 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 743 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.

  5. #5 United Air Temp

    Based in Fort Washington, 12 mi away

    90/100CR Score

    Ranked #5 because of its Google rating and availability: 4.8★ from 1,775 Google reviews, open 24/7.

    • 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

  7. #7 United Air Temp

    Based in Greater Upper Marlboro

    89/100CR Score

    Ranked #7 because of its Google rating and availability: 4.8★ from 146 Google reviews, open 24/7.

    • 4.8★ from 146 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    9634 Marlboro Pike, Upper Marlboro, MD 20772
    View profile for United Air Temp(410) 999-1851

  9. #9 Bethany Air

    Based in Edgewater, 12 mi away

    89/100CR Score

    Ranked #9 because of its Google rating and availability: 4.8★ from 1,251 Google reviews, open 24/7.

    • 4.8★ from 1,251 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    171 MD-253, Edgewater, MD 21037
    View profile for Bethany Air(410) 431-2312

  10. #10 United Air Temp

    Based in Greenbelt, 13 mi away

    89/100CR Score

    Ranked #10 because of its Google rating and availability: 4.8★ from 1,306 Google reviews, open 24/7.

    • 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

  13. #13 All-Pro Inc

    Based in Greater Upper Marlboro

    89/100CR Score

    Ranked #13 because of its Google rating and availability: 4.5★ from 246 Google reviews, open 24/7.

    • 4.5★ from 246 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1215 Ritchie Rd, Capitol Heights, MD 20743
    View profile for All-Pro Inc(866) 941-4328

  14. #14 John C. Flood

    Based in Alexandria, 22 mi away

    89/100CR Score

    Ranked #14 because of its Google rating and availability: 4.8★ from 4,976 Google reviews, open 24/7.

    • 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

  15. #15 Mission Comfort

    Based in Waldorf, 17 mi away

    88/100CR Score

    Ranked #15 because of its Google rating and availability: 5.0★ from 625 Google reviews, open 24/7.

    • 5.0★ from 625 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    11822 Pika Dr, Waldorf, MD 20602
    View profile for Mission Comfort(301) 450-5913

  22. #22 Caffi Services

    Based in Alexandria, 16 mi away

    88/100CR Score

    Ranked #22 because of its Google rating and availability: 4.9★ from 508 Google reviews, open 24/7.

    • 4.9★ from 508 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1313 Powhatan St, Alexandria, VA 22314
    View profile for Caffi Services(703) 962-6052

Top 50 of 743 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 Greater Upper Marlboro, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Alliance Trade Services875.0★ (24)In Greater Upper Marlboro
27David E White's Plumbing, Heating & Repair Company875.0★ (238)15 mi
28A.P. Mathews Heating & A/C874.8★ (111)7 mi
29ClimateCare HVAC Services, LLC.874.9★ (221)13 mi
30NARFIX HEATING AND AIR CONDITIONING LLC875.0★ (293)18 mi
31AG Services – Electrical, Air Conditioning, Heating & Plumbing874.9★ (440)18 mi
32One Hour Air Conditioning & Heating® of Gaithersburg874.8★ (302)14 mi
33United Air Temp874.8★ (1,318)22 mi
34C&V Home Services Inc874.9★ (114)11 mi
35Su' Coy Heating, AC & Duct Cleaning874.9★ (205)14 mi
36JDL HVAC & Plumbing Services874.8★ (678)19 mi
37United Air Temp874.7★ (855)18 mi
38Logan Mechanical LLC874.7★ (155)9 mi
39USA HVAC Services865.0★ (179)17 mi
40Olympic Aire Services Inc864.9★ (426)20 mi
41United Air Temp864.8★ (253)15 mi
42Magnolia Plumbing, Heating & Cooling864.4★ (1,519)16 mi
43A Action Home Services864.9★ (326)20 mi
44ARS / Rescue Rooter864.4★ (3,510)20 mi
45Environmental Systems Associates864.9★ (658)24 mi
46Su’Coy Heating, AC & Duct Cleaning864.9★ (64)10 mi
47True Knowledge HVAC Services865.0★ (10)In Greater Upper Marlboro
48Narfix Heating and Air Conditioning LLc865.0★ (49)11 mi
49One Hour Air Conditioning & Heating® of Annapolis854.8★ (367)20 mi
50United Air Temp854.4★ (4,301)24 mi

How we ranked emergency HVAC contractors in Greater Upper Marlboro

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 Greater Upper Marlboro: questions

Which HVAC contractors in Greater Upper Marlboro are open 24/7?

25 on this list post 24/7 hours, including Belair Engineering and Service Company, Inc., Fixed Right & Guaranteed Super Techs, LLC, Grove Heating & Cooling, Staton Heating, Cooling & Plumbing and United Air Temp.

Who is ranked #1 for emergency heating and cooling in Greater Upper Marlboro, MD?

Belair Engineering and Service Company, Inc. is #1, with a CR Score of 93 out of 100 on emergency weights.

How are emergency HVAC contractors in Greater Upper Marlboro 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 Greater Upper Marlboro

  1. October 2026: CR Scores recalculated for 743 hvac contractors serving Greater Upper Marlboro.
  2. October 2026: 5 duplicate listings merged.

More emergency and heating and cooling pages