392 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Saint John: Summers Plumbing Heating & Cooling, CR Score 95/100; 4.9★ from 4,666 Google reviews; open 24/7.
Best for emergencies (open 24/7): Merts Heating & Air Conditioning, posts 24/7 hours; ranked #2 of 392.
Most-reviewed: Home Comfort Experts, 4,299 Google reviews at 4.9★, the most of 392 ranked after Summers Plumbing Heating & Cooling; ranked #10.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
392 Saint John HVAC contractors are ranked here by CR Score, from 8 published factors. 162 are open 24/7, 281 open Saturdays and 217 open Sundays, based on posted hours. The median Google rating is 4.8★ across 392 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Summers Plumbing Heating & Cooling | 95 | 4.9★ (4,666) | Crown Point, 6 mi away | 24/7 | Overall |
| 2 | Merts Heating & Air Conditioning | 91 | 4.8★ (1,449) | Steger, 8 mi away | 24/7 | Emergencies |
| 3 | AAA Services, Inc. - Heating, Air Conditioning & Plumbing | 91 | 4.9★ (486) | Merrillville, 6 mi away | 24/7 | — |
| 4 | Illiana Heating & Air Conditioning, Inc. | 91 | 4.9★ (2,179) | Cedar Lake, 3 mi away | Sat · Sun · Evenings | — |
| 5 | True Quality HVAC | 91 | 5.0★ (368) | Gary, 8 mi away | 24/7 | — |
| 6 | Comfort Aire Inc | 90 | 4.8★ (508) | Merrillville, 6 mi away | 24/7 | — |
| 7 | EcoEdge Systems Heating & Cooling | 90 | 4.9★ (486) | Merrillville, 9 mi away | 24/7 | — |
| 8 | All American AC & Heating Repair | 90 | 4.9★ (275) | Crown Point, 7 mi away | 24/7 | — |
| 9 | Four Seasons Heating, Air Conditioning, Plumbing, & Electric | 90 | 4.8★ (3,722) | Crestwood, 19 mi away | 24/7 | — |
| 10 | Home Comfort Experts | 90 | 4.9★ (4,299) | Valparaiso, 23 mi away | 24/7 | Most reviews |
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.
Ranked #1 because of its Google rating and review volume: 4.9★ from 4,666 Google reviews, the most Google reviews on this list (4,666).
Based in Steger, 8 mi away
Ranked #2 because of its Google rating and availability: 4.8★ from 1,449 Google reviews, open 24/7.
Based in Merrillville, 6 mi away
Ranked #3 because of its Google rating and availability: 4.9★ from 486 Google reviews, open 24/7.
Based in Cedar Lake, 3 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 2,179 Google reviews, listed on Google as “Heating contractor”.
Based in Gary, 8 mi away
Ranked #5 because of its Google rating and availability: 5.0★ from 368 Google reviews, open 24/7.
Based in Merrillville, 6 mi away
Ranked #6 because of its Google rating and availability: 4.8★ from 508 Google reviews, open 24/7.
Based in Merrillville, 9 mi away
Ranked #7 because of its Google rating and availability: 4.9★ from 486 Google reviews, open 24/7.
Based in Crown Point, 7 mi away
Ranked #8 because of its Google rating and availability: 4.9★ from 275 Google reviews, open 24/7.
Based in Crestwood, 19 mi away
Ranked #9 because of its Google rating and availability: 4.8★ from 3,722 Google reviews, open 24/7.
Based in Valparaiso, 23 mi away
Ranked #10 because of its Google rating and availability: 4.9★ from 4,299 Google reviews, open 24/7.
Based in Crown Point, 6 mi away
Ranked #11 because of its Google rating and availability: 5.0★ from 152 Google reviews, open 24/7.
Based in Oak Forest, 17 mi away
Ranked #12 because of its Google rating and availability: 4.7★ from 3,996 Google reviews, open 24/7.
Based in Valparaiso, 23 mi away
Ranked #13 because of its Google rating and availability: 4.9★ from 3,188 Google reviews, open 24/7.
Based in Hobart, 9 mi away
Ranked #14 because of its Google rating and availability: 4.8★ from 516 Google reviews, open 24/7.
Based in Hobart, 13 mi away
Ranked #15 because of its Google rating and availability: 5.0★ from 310 Google reviews, open 24/7.
Based in Mokena, 19 mi away
Ranked #16 because of its Google rating and availability: 5.0★ from 664 Google reviews, open 24/7.
Based in Hobart, 12 mi away
Ranked #17 because of its Google rating and availability: 4.9★ from 295 Google reviews, open 24/7.
Based in Tinley Park, 25 mi away
Ranked #18 because of its Google rating and availability: 4.9★ from 2,423 Google reviews, open 24/7.
Based in Homewood, 13 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 2,200 Google reviews, listed on Google as “HVAC contractor”.
Based in Frankfort, 20 mi away
Ranked #20 because of its Google rating and availability: 4.8★ from 1,060 Google reviews, open 24/7.
Based in Alsip, 22 mi away
Ranked #21 because of its Google rating and availability: 4.9★ from 842 Google reviews, open 24/7.
Based in Valparaiso, 16 mi away
Ranked #22 because of its Google rating and availability: 4.8★ from 526 Google reviews, open 24/7.
Based in Hobart, 13 mi away
Ranked #23 because of its Google rating and availability: 5.0★ from 132 Google reviews, open 24/7.
Based in Mokena, 19 mi away
Ranked #24 because of its Google rating and availability: 4.9★ from 440 Google reviews, open 24/7.
Based in Mokena, 19 mi away
Ranked #25 because of its Google rating and availability: 4.9★ from 428 Google reviews, open 24/7.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 392 ranked HVAC contractors here; the rest are on their profiles.
20 more HVAC contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| A & J Electric | In Saint John | |
| Artesian Plumbing, Heating & Cooling, Inc. | 3.0★ (2) | 19 mi |
| Calumet Heating & Cooling | 3.0★ (2) | 18 mi |
| Chayhitz Repair | 5.0★ (2) | 20 mi |
| CMK Contractors Inc | 5.0★ (2) | 18 mi |
| Cold Air HVAC LLC | 4.4★ (35) | 5 mi |
| Comfort Zone Service | 5.0★ (296) | 21 mi |
| Cotton Construction | 5.0★ (2) | 21 mi |
| Crown Heating & Cooling Inc | 1.0★ (2) | 7 mi |
| Crown Wheele HVAC | 4.8★ (259) | 21 mi |
| Dynamic Heating & Piping | 1.0★ (2) | 19 mi |
| Earl's Heating & Airconditiong | 5.0★ (2) | 8 mi |
| HVAC Masters | 5.0★ (2) | 10 mi |
| Integrity Heating & Cooling | 4.5★ (816) | 21 mi |
| Lake Effect Heating and Cooling | 5.0★ (2) | 21 mi |
| Polar Heating & AC | 4.6★ (899) | 24 mi |
| Posen Heating & Air Services | 5.0★ (2) | 16 mi |
| Rps Heating & Air | 5.0★ (2) | 19 mi |
| Smg hvac | 5.0★ (2) | 20 mi |
| Tai's Heating and Air | 5.0★ (2) | 8 mi |
National price ranges in USD, not adjusted for Saint John. 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 Indiana, 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 392 Saint John 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.
| Factor | Weight | Computed from | In Saint John data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |