389 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Zion: Kern Heating & Cooling Co., CR Score 63/100; 4.7★ from 1,162 Google reviews; open 24/7.
Best for emergencies (open 24/7): Herchenbach Mechanical Inc., posts 24/7 hours; ranked #2 of 389.
Most-reviewed: ABC Plumbing, Sewer, Heating, Cooling & Electric, 22,524 Google reviews at 4.7★, the most of 389 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
389 Zion HVAC contractors are ranked here by CR Score, from ten published factors. 167 are open 24/7, 289 open Saturdays and 228 open Sundays, based on posted hours. The median Google rating is 4.9★ across 389 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Kern Heating & Cooling Co. | 63 | 4.7★ (1,162) | Beach Park, 2 mi away | 24/7 | Overall |
| 2 | Herchenbach Mechanical Inc. | 62 | 4.9★ (576) | Gurnee, 6 mi away | 24/7 | Emergencies |
| 3 | Cahill Heating, Cooling, Electric, Plumbing & Sewer | 62 | 5.0★ (1,064) | Lake Bluff, 12 mi away | 24/7 | — |
| 4 | TopTec Heating, Cooling, Plumbing & Electrical | 61 | 4.8★ (2,018) | Libertyville, 12 mi away | 24/7 | — |
| 5 | ABC Plumbing, Sewer, Heating, Cooling & Electric | 61 | 4.7★ (22,524) | Arlington Heights, 23 mi away | 24/7 | Most reviews |
| 6 | Command Service Center, INC | 61 | 5.0★ (745) | Antioch, 14 mi away | 24/7 | — |
| 7 | Comfort Cavalry Heating & Air | 61 | 4.9★ (1,086) | Antioch, 14 mi away | 24/7 | — |
| 8 | Allied Air Conditioning & Heating Corp. | 61 | 5.0★ (428) | Libertyville, 12 mi away | 24/7 | — |
| 9 | AA Service Co. | 61 | 4.9★ (3,150) | Northbrook, 21 mi away | 24/7 | — |
| 10 | Duane Blanton Plumbing, Sewer, Heating & Cooling | 60 | 4.7★ (2,290) | Round Lake, 15 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: 4.7★ from 1,162 Google reviews, listed on Google as “HVAC contractor”.
Based in Gurnee, 6 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 576 Google reviews, listed on Google as “HVAC contractor”.
Based in Lake Bluff, 12 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 1,064 Google reviews, listed on Google as “HVAC contractor”.
Based in Libertyville, 12 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 2,018 Google reviews, listed on Google as “HVAC contractor”.
Based in Arlington Heights, 23 mi away
Ranked #5 because of its Google rating and review volume: 4.7★ from 22,524 Google reviews, the most in Zion.
Based in Antioch, 14 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 745 Google reviews, listed on Google as “HVAC contractor”.
Based in Antioch, 14 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 1,086 Google reviews, listed on Google as “HVAC contractor”.
Based in Libertyville, 12 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 428 Google reviews, listed on Google as “HVAC contractor”.
Based in Northbrook, 21 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 3,150 Google reviews, listed on Google as “HVAC contractor”.
Based in Round Lake, 15 mi away
Ranked #10 because of its Google rating and trade focus: 4.7★ from 2,290 Google reviews, listed on Google as “HVAC contractor”.
Based in Grayslake, 13 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 986 Google reviews, listed on Google as “HVAC contractor”.
Based in Gurnee, 6 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 103 Google reviews, listed on Google as “HVAC contractor”.
Based in Gurnee, 7 mi away
Ranked #13 because of its Google rating and trade focus: 4.8★ from 232 Google reviews, listed on Google as “HVAC contractor”.
Based in Caledonia, 17 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 1,103 Google reviews, listed on Google as “HVAC contractor”.
Based in Lake Forest, 12 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 397 Google reviews, listed on Google as “HVAC contractor”.
Based in Zion
Ranked #16 because of its Google rating and trade focus: 5.0★ from 31 Google reviews, listed on Google as “HVAC contractor”.
Based in Kenosha, 13 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 322 Google reviews, listed on Google as “HVAC contractor”.
Based in Kenosha, 10 mi away
Ranked #18 because of its Google rating and trade focus: 4.8★ from 319 Google reviews, listed on Google as “HVAC contractor”.
Based in Antioch, 14 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 374 Google reviews, listed on Google as “HVAC contractor”.
Based in Gurnee, 4 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 62 Google reviews, listed on Google as “HVAC contractor”.
Based in Antioch, 15 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 235 Google reviews, listed on Google as “HVAC contractor”.
Based in Highwood, 17 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 274 Google reviews, listed on Google as “HVAC contractor”.
Based in Kenosha, 11 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 128 Google reviews, listed on Google as “HVAC contractor”.
Based in Buffalo Grove, 22 mi away
Ranked #24 because of its Google rating and trade focus: 4.7★ from 2,787 Google reviews, listed on Google as “HVAC contractor”.
Based in Libertyville, 14 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 165 Google reviews, listed on Google as “HVAC contractor”.
#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 389 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.C.M Heating/ Cooling And Residential Services | In Zion | |
| Al Misurelli & Son, Inc. | 4.5★ (2) | 13 mi |
| Celis HVAC | 5.0★ (2) | 7 mi |
| Cliste Electric and HVAC LLC | In Zion | |
| Code Plumbing | 4.7★ (12) | In Zion |
| G&G vargas | 5.0★ (2) | 13 mi |
| Gleason Plumbing, Heating and Air | 4.8★ (420) | 20 mi |
| GO GREEN Heating & Cooling | 5.0★ (2) | 9 mi |
| Hoover Heating & Cooling | In Zion | |
| Hoover Heating & Cooling | In Zion | |
| Mannina Creations | 5.0★ (2) | 13 mi |
| OVERALL HVAC LLC. | 3.0★ (2) | In Zion |
| Ray's Heating & Cooling | 3.0★ (2) | 7 mi |
| Rodgers Heating & Air Conditioning LLC | 4.9★ (72) | 10 mi |
| Rudy heating & cooling | In Zion | |
| S & D Services | In Zion | |
| Southport Mechanical | 2.5★ (2) | 10 mi |
| Temperature Perfect LLC | In Zion | |
| Thermal Mechanical Inc. | 3.0★ (2) | 12 mi |
| Weatherwise Heating & Air Conditioning | 5.0★ (2) | 3 mi |
National price ranges in USD, not adjusted for Zion. 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 389 Zion 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 Zion 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 |