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Emergency HVAC Contractors in Severn, MD (2026)

Top 50 of 862 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 Severn: Beltway Air Conditioning, Heating & Plumbing, 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 Severn at a glance

Top emergency HVAC contractors in Severn at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Beltway Air Conditioning, Heating & Plumbing654.9★ (2,167)Hanover, 2 mi away24/7
2Boothe's Heating, Air, Plumbing, Drains & Electrical634.9★ (1,461)Dundalk, 8 mi away24/7
3Michael & Son Services634.7★ (8,039)Baltimore, 14 mi away24/7
4Ambient LLC634.8★ (336)Severn24/7
5Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical634.8★ (4,514)Baltimore, 14 mi away24/7
6ARS / Rescue Rooter634.4★ (3,510)Laurel, 7 mi away24/7
7Staton Heating, Cooling & Plumbing634.9★ (2,904)Annapolis, 14 mi away24/7
8Grove Heating & Cooling624.9★ (1,156)Crofton, 10 mi away24/7
9Environmental Systems Associates624.9★ (658)Columbia, 8 mi away24/7
10Beltway Air Conditioning, Heating and Plumbing625.0★ (129)Severn24/7

Call an emergency HVAC contractor in Severn 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 Severn, 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 862 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.

  4. #4 Ambient LLC

    Based in Severn

    63/100CR Score

    Ranked #4 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

  6. #6 ARS / Rescue Rooter

    Based in Laurel, 7 mi away

    63/100CR Score

    Ranked #6 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

  11. #11 ROCKY LLC

    Based in Severn

    62/100CR Score

    Ranked #11 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

  16. #16 JDL HVAC & Plumbing Services

    Based in Laurel, 9 mi away

    62/100CR Score

    Ranked #16 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

  19. #19 United Air Temp

    Based in Greenbelt, 14 mi away

    61/100CR Score

    Ranked #19 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

  24. #24 United Air Temp

    Based in Jessup, 5 mi away

    61/100CR Score

    Ranked #24 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

  25. #25 Bethany Air

    Based in Edgewater, 16 mi away

    61/100CR Score

    Ranked #25 because of its Google rating and trade focus: 4.8★ from 1,251 Google reviews, listed on Google as “HVAC contractor”.

    • 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

Top 50 of 862 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 Severn, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26ClimateCare HVAC Services, LLC.614.9★ (221)8 mi
27One Hour Air Conditioning & Heating® of Annapolis614.8★ (367)10 mi
28THE ELECTRICIANS614.9★ (98)4 mi
29Alpha Heating & Air Conditioning, LLC614.9★ (419)13 mi
30F.H. Furr Plumbing, Heating, Air Conditioning & Electrical604.7★ (5,985)24 mi
31JJ HEATING & COOLING COMPANY604.8★ (110)5 mi
32Greenfox Cooling, Heating & Plumbing604.8★ (238)9 mi
33Tario HVAC, LLC604.9★ (142)8 mi
34At Your Service Heating and Cooling LLC604.6★ (811)14 mi
35David E White's Plumbing, Heating & Repair Company605.0★ (238)13 mi
36Abbott Brothers Plumbing & Heating of Maryland604.8★ (354)14 mi
37Reliability Home Services594.7★ (539)15 mi
38United Air Temp594.8★ (253)13 mi
39JC & JC HVAC594.7★ (503)15 mi
40Farnen & Dermer594.8★ (931)20 mi
41JV heating and air services594.8★ (114)9 mi
42Maryland Heating & Air594.9★ (369)17 mi
43Zoned Heating and Cooling595.0★ (40)5 mi
44All Good Home Inc595.0★ (98)11 mi
45Beyond Cooling LLC594.9★ (82)9 mi
46Breezy Heating Ventilation and Air Conditioning594.8★ (121)10 mi
47Mars Air Duct Cleaning594.9★ (177)13 mi
48NARFIX HEATING AND AIR CONDITIONING LLC595.0★ (293)17 mi
49One Hour Air Conditioning & Heating® of Baltimore594.8★ (219)14 mi
50Hughes Mechanical, LLC594.8★ (408)17 mi

How we ranked emergency HVAC contractors in Severn

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 Severn: questions

Which HVAC contractors in Severn are open 24/7?

25 on this list post 24/7 hours, including Beltway Air Conditioning, Heating & Plumbing, Boothe's Heating, Air, Plumbing, Drains & Electrical, Michael & Son Services, Ambient LLC and Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical.

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

Beltway Air Conditioning, Heating & Plumbing is #1, with a CR Score of 65 out of 100 on emergency weights.

How are emergency HVAC contractors in Severn 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 Severn

  1. October 2026: CR Scores recalculated for 862 hvac contractors serving Severn.
  2. October 2026: 5 duplicate listings merged.

More emergency and heating and cooling pages