121 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Mascoutah: Morrison Plumbing, Heating, Air, & Electrical Services, CR Score 64/100; 4.9★ from 8,631 Google reviews; open 24/7.
Best for emergencies (open 24/7): Classic Aire Care, posts 24/7 hours; ranked #2 of 121.
Most-reviewed: Hoffmann Brothers, 5,405 Google reviews at 4.9★, the most of 121 ranked after Morrison Plumbing, Heating, Air, & Electrical Services; ranked #7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
121 Mascoutah HVAC contractors are ranked here by CR Score, from ten published factors. 40 are open 24/7, 68 open Saturdays and 55 open Sundays, based on posted hours. The median Google rating is 4.9★ across 121 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Morrison Plumbing, Heating, Air, & Electrical Services | 64 | 4.9★ (8,631) | Collinsville, 18 mi away | 24/7 | Overall |
| 2 | Classic Aire Care | 63 | 5.0★ (1,160) | Fairview Heights, 13 mi away | 24/7 | Emergencies |
| 3 | The Heating & Cooling Guy located in Mascoutah Illinois. Service call $59. | 63 | 4.9★ (169) | Mascoutah | 24/7 | — |
| 4 | BELOMAN | 62 | 4.9★ (1,500) | Belleville, 14 mi away | 24/7 | — |
| 5 | Home Heating & Cooling | 62 | 5.0★ (586) | O'Fallon, 12 mi away | 24/7 | — |
| 6 | Tiger Plumbing, Heating, Air Conditioning, & Electrical Services | 62 | 4.7★ (5,072) | Collinsville, 17 mi away | 24/7 | — |
| 7 | Hoffmann Brothers | 62 | 4.9★ (5,405) | Edwardsville, 23 mi away | 24/7 | Most reviews |
| 8 | Heritage Heating & Cooling | 61 | 5.0★ (581) | O'Fallon, 9 mi away | Sat · Sun · Evenings | — |
| 9 | Viviano Heating & Air Conditioning, Inc. | 61 | 4.9★ (890) | Collinsville, 16 mi away | 24/7 | — |
| 10 | Polar Plumbing, Heating & Air Conditioning | 61 | 5.0★ (514) | Collinsville, 17 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 in Mascoutah
Based in Collinsville, 18 mi away
Ranked #1 because of its Google rating and review volume: 4.9★ from 8,631 Google reviews, the most in Mascoutah.
Based in Fairview Heights, 13 mi away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 1,160 Google reviews, listed on Google as “HVAC contractor”.
Based in Mascoutah
Ranked #3 because of its Google rating and trade focus: 4.9★ from 169 Google reviews, listed on Google as “HVAC contractor”.
Based in Belleville, 14 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 1,500 Google reviews, listed on Google as “Air conditioning repair service”.
Based in O'Fallon, 12 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 586 Google reviews, listed on Google as “HVAC contractor”.
Based in Collinsville, 17 mi away
Ranked #6 because of its Google rating and trade focus: 4.7★ from 5,072 Google reviews, listed on Google as “HVAC contractor”.
Based in Edwardsville, 23 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 5,405 Google reviews, listed on Google as “HVAC contractor”.
Based in O'Fallon, 9 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 581 Google reviews, listed on Google as “HVAC contractor”.
Based in Collinsville, 16 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 890 Google reviews, listed on Google as “HVAC contractor”.
Based in Collinsville, 17 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 514 Google reviews, listed on Google as “HVAC contractor”.
Based in Edwardsville, 22 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 1,039 Google reviews, listed on Google as “Heating contractor”.
Based in St. Louis, 24 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 1,401 Google reviews, listed on Google as “HVAC contractor”.
Based in Belleville, 10 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 318 Google reviews, listed on Google as “HVAC contractor”.
Based in Belleville, 11 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 230 Google reviews, listed on Google as “HVAC contractor”.
Based in East Saint Louis, 16 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 123 Google reviews, listed on Google as “HVAC contractor”.
Based in Fairview Heights, 8 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 1,322 Google reviews, listed on Google as “HVAC contractor”.
Based in East Saint Louis, 9 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 40 Google reviews, listed on Google as “HVAC contractor”.
Based in Shiloh, 12 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 36 Google reviews, listed on Google as “HVAC contractor”.
Based in Belleville, 8 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 197 Google reviews, listed on Google as “Plumber”.
Based in Belleville, 6 mi away
Ranked #20 because of its Google rating and trade focus: 4.7★ from 61 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Edwardsville, 19 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 82 Google reviews, listed on Google as “HVAC contractor”.
Based in Belleville, 15 mi away
Ranked #22 because of its Google rating and trade focus: 4.7★ from 49 Google reviews, listed on Google as “HVAC contractor”.
Based in Collinsville, 18 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 38 Google reviews, listed on Google as “HVAC contractor”.
Based in Columbia, 22 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 62 Google reviews, listed on Google as “HVAC contractor”.
Based in Swansea, 11 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 10 Google reviews, listed on Google as “HVAC contractor”.
#1 to #25 are shown in full above. Here are #30 to #43, in CR Score order; each links to its profile. We publish the top 43 of 121 ranked HVAC contractors here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 30 | CLEANSTREAM LLC | 55 | 5.0★ (202) | 9 mi |
| 31 | Guaranteed Comfort and Energy | 55 | 4.6★ (38) | 19 mi |
| 32 | Mike's Heating and Air | 55 | 4.5★ (22) | 17 mi |
| 36 | Inman Heating & Cooling | 54 | 4.1★ (45) | 17 mi |
| 43 | Abe's Appliance Service | 53 | 4.0★ (23) | 12 mi |
National price ranges in USD, not adjusted for Mascoutah. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| AC replacement | $3,887 | $5,978 | $8,073 | Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
| Furnace replacement | $2,823 | $4,814 | $6,896 | Per system, installed; typical range of customer-reported jobs. US national range | October 2026 |
In Illinois, furnace and heat pump calls peak in the coldest winter weeks and AC calls in summer heat waves. Spring and fall are the easiest times to book maintenance or a replacement.
We scored 121 Mascoutah HVAC contractors on ten 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. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, 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.
| Factor | Weight | Computed from | In Mascoutah data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |