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Emergency HVAC Contractors in Randallstown, MD (2026)

Top 50 of 618 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 Randallstown: Horizon Services - Air Conditioning, Heating, Plumbing, & 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 Randallstown at a glance

Top emergency HVAC contractors in Randallstown at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical664.8★ (4,514)Baltimore, 3 mi away24/7
2Farnen & Dermer634.8★ (931)Owings Mills, 4 mi away24/7
3Michael & Son Services634.7★ (8,039)Baltimore, 14 mi away24/7
4Triple E624.9★ (469)Reisterstown, 6 mi away24/7
5F.H. Furr Plumbing, Heating, Air Conditioning & Electrical624.7★ (1,847)Eldersburg, 12 mi away24/7
6Beltway Air Conditioning, Heating & Plumbing624.9★ (2,167)Hanover, 16 mi away24/7
7Complete Climate Services LLC625.0★ (786)Baltimore, 12 mi away24/7
8Alpha Heating & Air Conditioning, LLC624.9★ (419)Arbutus, 8 mi away24/7
9United Air Temp614.9★ (180)Owings Mills, 4 mi away24/7
10Len The Plumber Heating & Air, LLC614.7★ (15,911)Arbutus, 10 mi away24/7

Call an emergency HVAC contractor in Randallstown 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 Randallstown, 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 618 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 Farnen & Dermer

    Based in Owings Mills, 4 mi away

    63/100CR Score

    Ranked #2 because of its Google rating and trade focus: 4.8★ from 931 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 931 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    10500 Reisterstown Rd, Owings Mills, MD 21117
    View profile for Farnen & Dermer(410) 367-7777

  4. #4 Triple E

    Based in Reisterstown, 6 mi away

    62/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.9★ from 469 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 469 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    655 Main St #1959, Reisterstown, MD 21136
    View profile for Triple E(410) 833-1133

  9. #9 United Air Temp

    Based in Owings Mills, 4 mi away

    61/100CR Score

    Ranked #9 because of its Google rating and trade focus: 4.9★ from 180 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 180 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    500 Redland Ct # 107, Owings Mills, MD 21117
    View profile for United Air Temp(410) 999-8288

  17. #17 ARS / Rescue Rooter

    Based in Laurel, 17 mi away

    60/100CR Score

    Ranked #17 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

  24. #24 Tario HVAC, LLC

    Based in Arbutus, 10 mi away

    60/100CR Score

    Ranked #24 because of its Google rating and trade focus: 4.9★ from 142 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 142 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1319 Maple Ave, Halethorpe, MD 21227
    View profile for Tario HVAC, LLC(410) 314-1161

Top 50 of 618 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 Randallstown, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Fresh Air Concepts, LLC604.9★ (217)12 mi
27Presidential, Inc.604.9★ (1,701)24 mi
28A.J. Michaels594.5★ (309)10 mi
29Michael Bonsby HVAC, Plumbing & Electrical594.8★ (2,083)24 mi
30Apple Plumbing, Heating, & Air594.9★ (679)20 mi
31One Hour Air Conditioning & Heating® of Mount Airy594.7★ (852)18 mi
32Dalton Air Conditioning Repair595.0★ (44)6 mi
33Maryland Heating & Air594.9★ (369)17 mi
34Parker Pearce Service Experts594.8★ (1,700)24 mi
35Husky Home Services594.8★ (40)5 mi
36JDL HVAC & Plumbing Services594.8★ (678)20 mi
37Ambient LLC594.8★ (336)17 mi
38Beyond Cooling LLC594.9★ (82)10 mi
39Breezy Heating Ventilation and Air Conditioning594.8★ (121)11 mi
40Carver Heating & Cooling595.0★ (46)7 mi
41Fire n Ice Hvac, Inc595.0★ (90)12 mi
42Hughes Mechanical, LLC594.8★ (408)18 mi
43Beltway Air Conditioning, Heating & Plumbing594.9★ (90)11 mi
44Reliability Home Services594.7★ (539)19 mi
45Contemporary Air Systems, Inc.595.0★ (195)18 mi
46Witkowski Mechanical594.6★ (40)5 mi
47United Air Temp584.8★ (171)15 mi
48THE ELECTRICIANS584.9★ (98)14 mi
49Tim Kyle Electric, Heating & Cooling585.0★ (2,777)18 mi
50JC & JC HVAC584.7★ (503)21 mi

How we ranked emergency HVAC contractors in Randallstown

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 Randallstown: questions

Which HVAC contractors in Randallstown are open 24/7?

25 on this list post 24/7 hours, including Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical, Farnen & Dermer, Michael & Son Services, Triple E and F.H. Furr Plumbing, Heating, Air Conditioning & Electrical.

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

Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical is #1, with a CR Score of 66 out of 100 on emergency weights.

How are emergency HVAC contractors in Randallstown 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 Randallstown

  1. October 2026: CR Scores recalculated for 618 hvac contractors serving Randallstown.
  2. October 2026: 2 duplicate listings merged.

More emergency and heating and cooling pages