310 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Alton: Hoffmann Brothers, CR Score 64/100; 4.9★ from 5,405 Google reviews; open 24/7.
Best for emergencies (open 24/7): Morrison Plumbing, Heating, Air, & Electrical Services, posts 24/7 hours; ranked #2 of 310.
Most-reviewed: Hoffmann Brothers, 10,949 Google reviews at 4.9★, the most of 310 ranked; ranked #12.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
310 Alton HVAC contractors are ranked here by CR Score, from ten published factors. 104 are open 24/7, 202 open Saturdays and 163 open Sundays, based on posted hours. The median Google rating is 4.9★ across 310 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Hoffmann Brothers | 64 | 4.9★ (5,405) | Edwardsville, 13 mi away | 24/7 | Overall |
| 2 | Morrison Plumbing, Heating, Air, & Electrical Services | 64 | 4.9★ (8,631) | Collinsville, 17 mi away | 24/7 | Emergencies |
| 3 | Academy Air Heating, Cooling, Plumbing and Electric | 63 | 4.8★ (6,727) | Hazelwood, 14 mi away | 24/7 | — |
| 4 | B & B Heating & Cooling | 63 | 4.9★ (1,285) | Florissant, 10 mi away | 24/7 | — |
| 5 | Gene's Appliance AC & Heating | 63 | 4.9★ (207) | Alton | 24/7 | — |
| 6 | Hoffmann Brothers | 63 | 4.9★ (5,847) | St. Louis, 19 mi away | 24/7 | — |
| 7 | Classic Aire Care | 63 | 4.9★ (4,820) | St. Louis, 18 mi away | 24/7 | — |
| 8 | Air Comfort Service, Inc. | 62 | 4.9★ (2,041) | Hazelwood, 14 mi away | 24/7 | — |
| 9 | Classic Aire Care | 62 | 5.0★ (1,039) | Edwardsville, 13 mi away | 24/7 | — |
| 10 | Pruitt Mechanical Services | 62 | 4.9★ (672) | Bethalto, 8 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 because of its Google rating and trade focus: 4.9★ from 5,405 Google reviews, listed on Google as “HVAC contractor”.
Based in Collinsville, 17 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 8,631 Google reviews, listed on Google as “HVAC contractor”.
Based in Hazelwood, 14 mi away
Ranked #3 because of its Google rating and trade focus: 4.8★ from 6,727 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Florissant, 10 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 1,285 Google reviews, listed on Google as “HVAC contractor”.
Based in Alton
Ranked #5 because of its Google rating and trade focus: 4.9★ from 207 Google reviews, listed on Google as “HVAC contractor”.
Based in St. Louis, 19 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 5,847 Google reviews, listed on Google as “HVAC contractor”.
Based in St. Louis, 18 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 4,820 Google reviews, listed on Google as “HVAC contractor”.
Based in Hazelwood, 14 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 2,041 Google reviews, listed on Google as “HVAC contractor”.
Based in Edwardsville, 13 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 1,039 Google reviews, listed on Google as “Heating contractor”.
Based in Bethalto, 8 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 672 Google reviews, listed on Google as “HVAC contractor”.
Based in Wood River, 5 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 383 Google reviews, listed on Google as “HVAC contractor”.
Based in Brentwood, 20 mi away
Ranked #12 because of its Google rating and review volume: 4.9★ from 10,949 Google reviews, the most in Alton.
Based in Collinsville, 18 mi away
Ranked #13 because of its Google rating and trade focus: 4.7★ from 5,072 Google reviews, listed on Google as “HVAC contractor”.
Based in Saint Charles, 21 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 1,348 Google reviews, listed on Google as “HVAC contractor”.
Based in Wood River, 5 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 355 Google reviews, listed on Google as “HVAC contractor”.
Based in St. Louis, 20 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 1,401 Google reviews, listed on Google as “HVAC contractor”.
Based in Collinsville, 18 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 514 Google reviews, listed on Google as “HVAC contractor”.
Based in Collinsville, 19 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 890 Google reviews, listed on Google as “HVAC contractor”.
Based in Maryland Heights, 18 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 2,541 Google reviews, listed on Google as “HVAC contractor”.
Based in Fairview Heights, 23 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 1,160 Google reviews, listed on Google as “HVAC contractor”.
Based in Saint Peters, 24 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 1,159 Google reviews, listed on Google as “HVAC contractor”.
Based in Alton
Ranked #22 because of its Google rating and trade focus: 4.5★ from 67 Google reviews, listed on Google as “HVAC contractor”.
Based in Saint Charles, 17 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 422 Google reviews, listed on Google as “HVAC contractor”.
Based in St. Louis, 17 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 476 Google reviews, listed on Google as “HVAC contractor”.
Based in Berkeley, 16 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 303 Google reviews, listed on Google as “HVAC contractor”.
#1 to #25 are shown in full above. Here are #27 to #30, in CR Score order; each links to its profile. We publish the top 30 of 310 ranked HVAC contractors here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 27 | Home Heating & Cooling | 59 | 5.0★ (586) | 24 mi |
| 28 | St. Louis Heating and Air Conditioning | 59 | 4.9★ (487) | 20 mi |
| 30 | Missouri Furnace & Air Conditioning | 59 | 4.9★ (275) | 17 mi |
National price ranges in USD, not adjusted for Alton. 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 310 Alton 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 Alton 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 |