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Emergency HVAC Contractors in Casselberry, FL (2026)

Top 50 of 745 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 Casselberry: American Air, Plumbing, and 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 Casselberry at a glance

Top emergency HVAC contractors in Casselberry at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1American Air, Plumbing, and Electrical664.9★ (8,447)Sanford, 8 mi away24/7
2Cool Today - Cooling, Plumbing, Electrical664.8★ (4,827)Altamonte Springs, 4 mi away24/7
3Mechanical One665.0★ (2,454)Altamonte Springs, 4 mi away24/7
4Rainaldi Home Services654.8★ (5,502)Orlando, 8 mi away24/7
5Pro-Tech Air Conditioning & Plumbing Service644.8★ (2,898)Winter Park, 7 mi away24/7
6Frank Gay Residential Services644.6★ (8,222)Orlando, 9 mi away24/7
7Clear Comfort645.0★ (1,046)Horizon West, 5 mi away24/7
8Pro-Tech Air Conditioning & Plumbing Service644.9★ (1,184)Lake Mary, 5 mi away24/7
9Service Plus AC & Heating644.9★ (729)Apopka, 3 mi away24/7
10Mills Air Inc644.7★ (2,318)Orlando, 7 mi away24/7

Call an emergency HVAC contractor in Casselberry 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 Casselberry, 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 745 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.

  3. #3 Mechanical One

    Based in Altamonte Springs, 4 mi away

    66/100CR Score

    Ranked #3 because of its Google rating and trade focus: 5.0★ from 2,454 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 2,454 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    217 N Westmonte Dr #1007, Altamonte Springs, FL 32714
    View profile for Mechanical One(407) 220-1780

  7. #7 Clear Comfort

    Based in Horizon West, 5 mi away

    64/100CR Score

    Ranked #7 because of its Google rating and trade focus: 5.0★ from 1,046 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 1,046 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Clear Comfort(407) 408-0776

  10. #10 Mills Air Inc

    Based in Orlando, 7 mi away

    64/100CR Score

    Ranked #10 because of its Google rating and trade focus: 4.7★ from 2,318 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 2,318 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    6502 Forest City Rd, Orlando, FL 32810
    View profile for Mills Air Inc(407) 277-1159

  15. #15 E&G HVAC services

    Based in Winter Springs, 2 mi away

    63/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.8★ from 532 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 532 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    430 Sheoah Blvd #218, Winter Springs, FL 32708
    View profile for E&G HVAC services(407) 960-6198

  18. #18 Belle Air

    Based in Orlando, 12 mi away

    63/100CR Score

    Ranked #18 because of its Google rating and trade focus: 4.9★ from 1,733 Google reviews, listed on Google as “Heating contractor”.

    • 4.9★ from 1,733 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    379 W Michigan St Ste 200, Orlando, FL 32806
    View profile for Belle Air(407) 543-2050

  19. #19 Mechanical One

    Based in Altamonte Springs, 3 mi away

    63/100CR Score

    Ranked #19 because of its Google rating and trade focus: 5.0★ from 293 Google reviews, listed on Google as “Air conditioning contractor”.

    • 5.0★ from 293 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    307 Cranes Roost Blvd #2010, Altamonte Springs, FL 32701
    View profile for Mechanical One(407) 439-0998

  22. #22 R & A Industries

    Based in Oviedo, 7 mi away

    63/100CR Score

    Ranked #22 because of its Google rating and trade focus: 4.9★ from 603 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 603 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    306 Aulin Ave, Oviedo, FL 32765
    View profile for R & A Industries(407) 384-0034

Top 50 of 745 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 Casselberry, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26ABC Air Conditioning and Heating Specialist- Oviedo624.9★ (478)7 mi
27Air Flow Designs Heating & Air Conditioning624.4★ (448)In Casselberry
28Del-Air Heating, Air Conditioning, Plumbing and Electrical624.7★ (3,970)16 mi
29ProMag Energy Group A/C & Heating, Inc.624.7★ (1,341)10 mi
30ARS / Rescue Rooter624.3★ (3,758)10 mi
31Mechanical One of Orlando - Air Conditioning, Plumbing and Electrical625.0★ (1,083)14 mi
32Greens Energy HVAC & Fuel624.7★ (954)9 mi
33Armstrong Air & Electric624.9★ (2,186)17 mi
34Ferran Air Conditioning, Electrical & Plumbing624.7★ (1,254)11 mi
35Energy Masters Air624.9★ (117)1 mi
36High Tech Air Conditioning625.0★ (268)7 mi
37Sun City624.9★ (172)4 mi
384 Seasons Air Conditioning and Heating624.7★ (576)8 mi
39Swift Brothers Plumbing, Heating & Air624.8★ (302)6 mi
40Arctic Cool Inc614.8★ (107)1 mi
41Captain Comfort615.0★ (112)4 mi
42United Air Temp614.8★ (298)7 mi
43Benzah Vent Cleaning LLC615.0★ (236)9 mi
44Rinaldi's Energy Solutions614.7★ (1,030)13 mi
45A/C Mechanix Heat & Air614.4★ (231)2 mi
46ABC Cleaning Inc. of Orlando614.9★ (349)11 mi
47Cool Baby Air Conditioning and Heating615.0★ (84)4 mi
48Pro-Tech Air Conditioning & Plumbing Service, Inc614.9★ (1,125)17 mi
49Autumn Air Conditioning and Heating LLC615.0★ (756)17 mi
50Bob Heinmiller Air Conditioning Inc614.6★ (439)9 mi

How we ranked emergency HVAC contractors in Casselberry

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 Casselberry: questions

Which HVAC contractors in Casselberry are open 24/7?

25 on this list post 24/7 hours, including American Air, Plumbing, and Electrical, Cool Today - Cooling, Plumbing, Electrical, Mechanical One, Rainaldi Home Services and Pro-Tech Air Conditioning & Plumbing Service.

Who is ranked #1 for emergency heating and cooling in Casselberry, FL?

American Air, Plumbing, and Electrical is #1, with a CR Score of 66 out of 100 on emergency weights.

How are emergency HVAC contractors in Casselberry 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 Casselberry

  1. October 2026: CR Scores recalculated for 745 hvac contractors serving Casselberry.
  2. October 2026: 2 duplicate listings merged.

More emergency and heating and cooling pages