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ContractorsRanked

Best HVAC Contractors in Irmo, SC (2026)

166 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Irmo: Cassell Brothers Home Services, CR Score 96/100; 4.9★ from 6,521 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Midland Air Service Experts, posts 24/7 hours; ranked #2 of 166.

  3. 2

    Most-reviewed: Midland Air Service Experts, 6,227 Google reviews at 4.9★, the most of 166 ranked after Cassell Brothers Home Services; ranked #2.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

166 Irmo HVAC contractors are ranked here by CR Score, from 8 published factors. 56 are open 24/7, 105 open Saturdays and 84 open Sundays, based on posted hours. The median Google rating is 4.8★ across 166 rated businesses.

Most of this list also appears on the HVAC contractors in Columbia ranking. See HVAC contractors in Columbia

Top 10 HVAC contractors in Irmo at a glance

Top 10 HVAC contractors in Irmo at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Cassell Brothers Home Services964.9★ (6,521)Irmo24/7Overall
2Midland Air Service Experts944.9★ (6,227)Lexington, 9 mi away24/7Emergencies, Most reviews
3Carolina Conditions Heating Cooling Plumbing Electrical934.9★ (4,075)Lexington, 8 mi away24/7—
4Call Dad934.9★ (1,693)Columbia, 5 mi away24/7—
5Carolina Comfort, Inc.924.8★ (1,070)Columbia, 2 mi away24/7—
6All American Heating & Air914.8★ (784)West Columbia, 7 mi away24/7—
7Stoudenmire Heating & Air Conditioning904.9★ (815)Columbia, 11 mi away24/7—
82nd Wind Heating & Air Conditioning904.8★ (1,559)Columbia, 12 mi away24/7—
9Solutions Heating & Air, LLC904.9★ (523)Columbia, 9 mi away24/7—
10Cottrell & Co, Inc Plumbing Heating And Air904.9★ (529)West Columbia, 10 mi away24/7—

The 166 best HVAC contractors in Irmo, ranked

Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.

Scores below: based on 6 of 8 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

    93/100CR Score

    Ranked #4 because of its Google rating and availability: 4.9★ from 1,693 Google reviews, open 24/7.

    • 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

HVAC contractors ranked #30 to #30

#1 to #25 are shown in full above. Here are #30 to #30, in CR Score order; each links to its profile. We publish the top 30 of 166 ranked HVAC contractors here; the rest are on their profiles.

HVAC contractors in Irmo, ranks 30 to 30
RankBusinessCR ScoreGoogle ratingDistance
30Airport Heating & Cooling, Inc874.9★ (512)10 mi

How much do HVAC contractors cost in Irmo?

National price ranges in USD, not adjusted for Irmo. Each row names its basis and the month we checked it.

How much do HVAC contractors cost in Irmo?
JobLowTypicalHighBasisChecked
AC replacement$3,887$5,978$8,073Per system, installed (unit plus labor); typical range of customer-reported jobs. US national rangeOctober 2026
Furnace replacement$2,823$4,814$6,896Per system, installed; typical range of customer-reported jobs. US national rangeOctober 2026

How to check an HVAC contractor's license in South Carolina

In South Carolina, South Carolina Contractor’s Licensing Board (LLR) licenses Mechanical contractor licenses for commercial work; residential specialty contractors register with the Residential Builders Commission.

  1. Check that the status is active and the name matches the contract or truck.
  2. Ask for proof of insurance before work starts.

No chip usually means we have not matched a state record yet. Check the lookup yourself before you hire.

Guide checked October 2026. How we verify licenses

When to hire an HVAC contractor in South Carolina

In South Carolina, air conditioning calls peak in the hottest summer months. Spring is the easiest time to book a tune-up or replacement, before the first heat wave.

How we ranked Irmo HVAC contractors

We scored 166 Irmo HVAC contractors on 8 factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. Unknown factors are left out of the score, not counted as zero. Scores last refreshed October 22, 2026.

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 fromIn Irmo data
Reputation35%Bayesian-adjusted Google star ratingMeasured
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2Not yet collected
Review volume10%log10(reviews + 1) against the list maximumMeasured
Recency10%Share of reviews from the last 12 monthsNot yet collected
Availability10%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5Measured
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radiusMeasured
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)Measured

HVAC contractors in Irmo: frequently asked questions

Who is the best HVAC contractor in Irmo?

By CR Score, the highest-ranked HVAC contractor in Irmo, SC is Cassell Brothers Home Services with a CR Score of 96/100. It has 4.9★ from 6,521 Google reviews. It is open 24/7. Midland Air Service Experts (#2) and Carolina Conditions Heating Cooling Plumbing Electrical (#3) follow. We ranked 166 HVAC contractors on 8 factors, last updated October 22, 2026.

How many HVAC contractors are there in Irmo?

ContractorsRanked ranks 166 HVAC contractors serving Irmo, SC. 2 of them are based in Irmo; the rest serve it from nearby towns. Counts are as of October 2026.

Which HVAC contractors in Irmo are open 24/7?

56 ranked HVAC contractors in Irmo post 24/7 hours. The highest-ranked are Cassell Brothers Home Services (#1), Midland Air Service Experts (#2) and Carolina Conditions Heating Cooling Plumbing Electrical (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which HVAC contractors in Irmo work on weekends?

105 of 166 ranked HVAC contractors post Saturday hours and 84 post Sunday hours. The highest-ranked open Saturdays are Cassell Brothers Home Services (#1), Midland Air Service Experts (#2) and Carolina Conditions Heating Cooling Plumbing Electrical (#3). Posted hours are office hours; crews may book weekend jobs separately.

How do I check an HVAC contractor's license in South Carolina?

In South Carolina, South Carolina Contractor’s Licensing Board (LLR) handles licensing and covers Mechanical contractor licenses for commercial work; residential specialty contractors register with the Residential Builders Commission.

How much does ac replacement cost in Irmo?

AC replacement typically costs $3,887 to $8,073, with $5,978 typical (Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range). This is a national range, not adjusted for Irmo. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Irmo HVAC contractors have?

The median Google rating among 166 rated HVAC contractors in Irmo is 4.8★, with a median of 36 reviews. Cassell Brothers Home Services has the most, 6,521 reviews, and ranks #1. We adjust ratings for review count, so a few five-star reviews cannot top the list.

When is the best time to hire an HVAC contractor in Irmo?

In South Carolina, air conditioning calls peak in the hottest summer months. Spring is the easiest time to book a tune-up or replacement, before the first heat wave.

Update log for Irmo

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

More HVAC contractors and Irmo pages

Other trades in Irmo