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Emergency HVAC Contractors in Overlea, MD (2026)

Top 50 of 572 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 Overlea: Michael & Son Services, 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 Overlea at a glance

Top emergency HVAC contractors in Overlea at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Michael & Son Services934.7★ (8,039)Baltimore, 4 mi away24/7
2Complete Climate Services LLC915.0★ (786)Baltimore, 6 mi away24/7
3Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical914.8★ (4,514)Baltimore, 13 mi away24/7
4Maryland Heating & Air904.9★ (369)Essex, 4 mi away24/7
5Boothe's Heating, Air, Plumbing, Drains & Electrical904.9★ (1,461)Dundalk, 13 mi away24/7
6Contemporary Air Systems, Inc.905.0★ (195)Essex, 5 mi away24/7
7Hughes Mechanical, LLC904.8★ (408)Essex, 5 mi away24/7
8Beltway Air Conditioning, Heating & Plumbing904.9★ (2,167)Hanover, 17 mi away24/7
9Alpha Heating & Air Conditioning, LLC894.9★ (419)Arbutus, 8 mi away24/7
10At Your Service Heating and Cooling LLC894.6★ (811)Baltimore, 5 mi away24/7

Call an emergency HVAC contractor in Overlea 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 Overlea, 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 572 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.

  14. #14 Blue Dot Services

    Based in Bel Air North, 17 mi away

    89/100CR Score

    Ranked #14 because of its Google rating and availability: 4.5★ from 7,297 Google reviews, open 24/7.

    • 4.5★ from 7,297 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    125 Industry Ln, Forest Hill, MD 21050
    View profile for Blue Dot Services(410) 846-2992

  16. #16 Broyles HVACR

    Based in Joppatowne, 9 mi away

    88/100CR Score

    Ranked #16 because of its Google rating and availability: 4.9★ from 244 Google reviews, open 24/7.

    • 4.9★ from 244 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    37 Neptune Dr, Joppatowne, MD 21085
    View profile for Broyles HVACR(667) 228-7015

  18. #18 Farnen & Dermer

    Based in Owings Mills, 15 mi away

    88/100CR Score

    Ranked #18 because of its Google rating and availability: 4.8★ from 931 Google reviews, open 24/7.

    • 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

  19. #19 HGH Mechanical

    Based in Edgewood, 13 mi away

    88/100CR Score

    Ranked #19 because of its Google rating and availability: 4.9★ from 337 Google reviews, open 24/7.

    • 4.9★ from 337 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2107 Emmorton Park Rd #111, Edgewood, MD 21040
    View profile for HGH Mechanical(410) 679-3794

  23. #23 A.J. Michaels

    Based in Baltimore, 5 mi away

    87/100CR Score

    Ranked #23 because of its Google rating and availability: 4.5★ from 309 Google reviews, open 24/7.

    • 4.5★ from 309 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    4512 York Rd, Baltimore, MD 21212
    View profile for A.J. Michaels(410) 435-5400

Top 50 of 572 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 Overlea, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Triple E874.9★ (469)17 mi
27Anchor Mechanical LLC874.9★ (340)17 mi
28Rowbel Services875.0★ (32)3 mi
29Breezy Heating Ventilation and Air Conditioning874.8★ (121)9 mi
30Aire Serv of Bel Air874.9★ (309)17 mi
31Tario HVAC, LLC874.9★ (142)12 mi
32Environmental Systems Associates864.9★ (658)22 mi
33Ambient LLC864.8★ (336)17 mi
34Comfort Air865.0★ (65)11 mi
35Beyond Cooling LLC864.9★ (82)11 mi
36First Response Heating & Cooling864.8★ (285)17 mi
37G & G Mechanical Heating & AC864.7★ (51)6 mi
38Synergy Mechanical Solutions865.0★ (37)7 mi
39AAA864.7★ (60)1 mi
40Aire-Craft Heating & Cooling Co Inc864.8★ (26)4 mi
41F.H. Furr Plumbing, Heating, Air Conditioning & Electrical864.7★ (1,847)24 mi
42United Air Temp864.9★ (180)16 mi
43Warrior Plumbing & Heating864.9★ (400)6 mi
44Dalton Air Conditioning Repair865.0★ (44)10 mi
45One Hour Air Conditioning & Heating® of Harford County864.8★ (292)18 mi
46Baltimore HVAC Repair Elite865.0★ (10)1 mi
47United Air Temp864.4★ (88)5 mi
48Griff's Heating and Air855.0★ (93)16 mi
49One Hour Air Conditioning & Heating® of Annapolis854.8★ (367)20 mi
50D&J solutions LLC854.9★ (17)4 mi

How we ranked emergency HVAC contractors in Overlea

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 Overlea: questions

Which HVAC contractors in Overlea are open 24/7?

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

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

Michael & Son Services is #1, with a CR Score of 93 out of 100 on emergency weights.

How are emergency HVAC contractors in Overlea 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 Overlea

  1. October 2026: CR Scores recalculated for 572 hvac contractors serving Overlea.
  2. October 2026: 2 duplicate listings merged.

More emergency and heating and cooling pages