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Emergency HVAC Contractors in Irmo, SC (2026)

Top 25 of 166 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank

25 of the 25 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 Irmo: Cassell Brothers Home 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 Irmo at a glance

Top emergency HVAC contractors in Irmo at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Cassell Brothers Home Services684.9★ (6,521)Irmo24/7
2Midland Air Service Experts664.9★ (6,227)Lexington, 9 mi away24/7
3Carolina Conditions Heating Cooling Plumbing Electrical664.9★ (4,075)Lexington, 8 mi away24/7
4Call Dad654.9★ (1,693)Columbia, 5 mi away24/7
5Carolina Comfort, Inc.654.8★ (1,070)Columbia, 2 mi away24/7
6Killman Heating & Air645.0★ (927)Lexington, 8 mi away24/7
7ARS / Rescue Rooter644.4★ (3,522)Columbia, 8 mi away24/7
8All American Heating & Air634.8★ (784)West Columbia, 7 mi away24/7
92nd Wind Heating & Air Conditioning634.8★ (1,559)Columbia, 12 mi away24/7
10Stoudenmire Heating & Air Conditioning634.9★ (815)Columbia, 11 mi away24/7

Call an emergency HVAC contractor in Irmo 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 25 emergency HVAC contractors in Irmo, 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 166 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 Call Dad

    Based in Columbia, 5 mi away

    65/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.9★ from 1,693 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 1,693 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1410 St Andrews Rd, Columbia, SC 29210
    View profile for Call Dad(803) 486-8409

  7. #7 ARS / Rescue Rooter

    Based in Columbia, 8 mi away

    64/100CR Score

    Ranked #7 because of its Google rating and trade focus: 4.4★ from 3,522 Google reviews, listed on Google as “HVAC contractor”.

    • 4.4★ from 3,522 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    121 Winhill Rd, Columbia, SC 29203
    View profile for ARS / Rescue Rooter(803) 973-6781

  24. #24 SC Heating And Air

    Based in Columbia, 5 mi away

    60/100CR Score

    Ranked #24 because of its Google rating and trade focus: 4.7★ from 80 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 80 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    713 Tower Ln, Columbia, SC 29210
    View profile for SC Heating And Air(803) 309-8475

How we ranked emergency HVAC contractors in Irmo

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 Irmo: questions

Which HVAC contractors in Irmo are open 24/7?

25 on this list post 24/7 hours, including Cassell Brothers Home Services, Midland Air Service Experts, Carolina Conditions Heating Cooling Plumbing Electrical, Call Dad and Carolina Comfort, Inc..

Who is ranked #1 for emergency heating and cooling in Irmo, SC?

Cassell Brothers Home Services is #1, with a CR Score of 68 out of 100 on emergency weights.

How are emergency HVAC contractors in Irmo 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 Irmo

  1. October 2026: CR Scores recalculated for 166 hvac contractors serving Irmo.
  2. October 2026: 1 duplicate listing merged.

More emergency and heating and cooling pages