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Emergency HVAC Contractors in Kennesaw, GA (2026)

Top 50 of 383 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 Kennesaw: Cool Air Mechanical, 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 Kennesaw at a glance

Top emergency HVAC contractors in Kennesaw at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Cool Air Mechanical674.9★ (10,810)Marietta, 5 mi away24/7
2Coolray Heating & Air Conditioning674.8★ (10,615)Marietta, 5 mi away24/7
3E. Dennis Heating, Cooling, Plumbing & Electrical654.9★ (4,846)Marietta, 8 mi away24/7
4E. Smith Heating & Air Conditioning654.9★ (1,775)Marietta, 6 mi away24/7
5Summit635.0★ (529)Marietta, 7 mi away24/7
6HVAC Bee635.0★ (582)Woodstock, 8 mi away24/7
7Casteel Heating, Cooling, Plumbing & Electrical634.8★ (10,009)Marietta, 5 mi away24/7
8Air Force Heating & Air624.8★ (1,194)Marietta, 10 mi away24/7
9Guardian Home Experts- Heating, Air, Plumbing & Electrical624.9★ (1,303)Cartersville, 15 mi away24/7
10ANYTIME HEATING, COOLING AND PLUMBING624.8★ (408)Marietta, 8 mi away24/7

Call an emergency HVAC contractor in Kennesaw 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 Kennesaw, 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 383 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 Kennesaw

    #1 Cool Air Mechanical

    Based in Marietta, 5 mi away

    67/100CR Score

    Ranked #1 because of its Google rating and trade focus: 4.9★ from 10,810 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 10,810 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1950 Guffin Ln, Marietta, GA 30066
    View profile for Cool Air Mechanical(470) 531-5480

  5. #5 Summit

    Based in Marietta, 7 mi away

    63/100CR Score

    Ranked #5 because of its Google rating and trade focus: 5.0★ from 529 Google reviews, listed on Google as “Air conditioning contractor”.

    • 5.0★ from 529 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    51 Austin Ave NE, Marietta, GA 30060
    View profile for Summit(770) 282-9545

  6. #6 HVAC Bee

    Based in Woodstock, 8 mi away

    63/100CR Score

    Ranked #6 because of its Google rating and trade focus: 5.0★ from 582 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 582 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    715 Hammond Dr, Woodstock, GA 30188
    View profile for HVAC Bee(678) 327-8360

  15. #15 United Air Temp

    Based in Marietta, 12 mi away

    61/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.8★ from 497 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 497 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1240 Johnson Ferry Pl Building - C Suite #220, Marietta, GA 30068
    View profile for United Air Temp(770) 999-0314

  17. #17 Carter and Sons HVAC

    Based in Smyrna, 11 mi away

    61/100CR Score

    Ranked #17 because of its Google rating and trade focus: 4.9★ from 339 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 339 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1701 McCoba Dr SE Suite A, Smyrna, GA 30080
    View profile for Carter and Sons HVAC(770) 434-4095

  24. #24 The Air Company

    Based in Atlanta, 16 mi away

    60/100CR Score

    Ranked #24 because of its Google rating and trade focus: 5.0★ from 361 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 361 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    10 Glenlake Pkwy NE Suite 130, Atlanta, GA 30328
    View profile for The Air Company(404) 583-7788

Top 50 of 383 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 Kennesaw, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26inAir Heating & Air Conditioning604.8★ (324)13 mi
27Assured Comfort Heating, Air, Plumbing604.7★ (147)8 mi
28Neese Heating, AC and Plumbing604.9★ (1,955)24 mi
29RS Andrews604.9★ (159)11 mi
30Staton Heating & Air Inc604.9★ (754)20 mi
31Comfort Solutions Heating & Cooling LLC604.9★ (1,371)24 mi
32MARService Heating & Air Conditioning604.8★ (53)5 mi
33Airworx North Atlanta605.0★ (137)13 mi
34Rooter ProXpress604.6★ (3,109)24 mi
35Southern Airflow Advisors604.9★ (94)10 mi
36SLAM Heating & Cooling605.0★ (264)16 mi
37Burton Heating & Air Conditioning Services604.4★ (26)In Kennesaw
38Cunningham Associates594.8★ (1,107)22 mi
39All Weather Heating and Air, LLC594.8★ (225)15 mi
40Reliable Heating & Air, Plumbing and Electrical - Alpharetta594.8★ (510)19 mi
41Cary Moody Heating & Air594.9★ (493)22 mi
42Majestic Plumbing, Electric & HVAC594.7★ (709)7 mi
43TempTide595.0★ (24)7 mi
44Aaron Plumbing585.0★ (108)16 mi
45Climate Heroes Air Conditioning585.0★ (163)18 mi
46Superior Indoor Comfort, Inc.584.8★ (424)21 mi
47Comfort584.8★ (138)16 mi
48United Air Temp584.8★ (703)24 mi
49Wilson Air Conditioning Service, Inc.584.7★ (76)11 mi
50Cool Max HVAC584.9★ (245)20 mi

How we ranked emergency HVAC contractors in Kennesaw

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 Kennesaw: questions

Which HVAC contractors in Kennesaw are open 24/7?

25 on this list post 24/7 hours, including Cool Air Mechanical, Coolray Heating & Air Conditioning, E. Dennis Heating, Cooling, Plumbing & Electrical, E. Smith Heating & Air Conditioning and Summit.

Who is ranked #1 for emergency heating and cooling in Kennesaw, GA?

Cool Air Mechanical is #1, with a CR Score of 67 out of 100 on emergency weights.

How are emergency HVAC contractors in Kennesaw 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 Kennesaw

  1. October 2026: CR Scores recalculated for 383 hvac contractors serving Kennesaw.
  2. October 2026: 3 duplicate listings merged.

More emergency and heating and cooling pages