83 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Janesville: 24HR Home Comfort Services, CR Score 66/100; 4.9★ from 2,863 Google reviews; open 24/7.
Best for emergencies (open 24/7): Rock Valley Services, Inc., posts 24/7 hours; ranked #2 of 83.
Most-reviewed: Appliance Repair Experts, 1,444 Google reviews at 4.8★, the most of 83 ranked after 24HR Home Comfort Services; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
83 Janesville HVAC contractors are ranked here by CR Score, from ten published factors. 28 are open 24/7, 47 open Saturdays and 35 open Sundays, based on posted hours. The median Google rating is 4.6★ across 83 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | 24HR Home Comfort Services | 66 | 4.9★ (2,863) | Milton, 8 mi away | 24/7 | Overall |
| 2 | Rock Valley Services, Inc. | 65 | 4.9★ (443) | Janesville | 24/7 | Emergencies |
| 3 | Appliance Repair Experts | 65 | 4.8★ (1,444) | Janesville | Sat · Sun · Evenings | Most reviews |
| 4 | J. C. Heating and Cooling, Inc. | 60 | 5.0★ (385) | Janesville | — | — |
| 5 | Perfect Temp Heating & Cooling | 59 | 4.8★ (719) | Loves Park, 25 mi away | 24/7 | — |
| 6 | Edelman Heating, Cooling, Plumbing, Electric & Solar | 59 | 4.8★ (396) | Elkhorn, 23 mi away | 24/7 | — |
| 7 | Air Systems, Inc. | 58 | 4.8★ (277) | Elkhorn, 22 mi away | 24/7 | — |
| 8 | Stanton Heating & Cooling LLC | 57 | 5.0★ (7) | Janesville | Sat · Sun | — |
| 9 | Clark Heating & Cooling Inc | 56 | 4.6★ (62) | Stoughton, 20 mi away | 24/7 | — |
| 10 | G-Force Home Solutions | 56 | 5.0★ (30) | Whitewater, 20 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and review volume: 4.9★ from 2,863 Google reviews, the most in Janesville.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville
Ranked #2 because of its Google rating and trade focus: 4.9★ from 443 Google reviews, listed on Google as “Furnace repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville
Ranked #3 because of its Google rating and trade focus: 4.8★ from 1,444 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville
Ranked #4 because of its Google rating and trade focus: 5.0★ from 385 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Loves Park, 25 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 719 Google reviews, listed on Google as “Heating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Elkhorn, 23 mi away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 396 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Elkhorn, 22 mi away
Ranked #7 because of its Google rating and trade focus: 4.8★ from 277 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville
Ranked #8 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stoughton, 20 mi away
Ranked #9 because of its Google rating and trade focus: 4.6★ from 62 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Whitewater, 20 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 30 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Machesney Park, 21 mi away
Ranked #11 because of its Google rating and trade focus: 4.7★ from 54 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 17 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 21 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville
Ranked #13 because of its Google rating and trade focus: 3.8★ from 4 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Machesney Park, 22 mi away
Ranked #14 because of its Google rating and trade focus: 4.6★ from 60 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville
Ranked #15 because of its Google rating and trade focus: 3.4★ from 5 Google reviews, listed on Google as “Heating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville
Ranked #16 because of its Google rating and trade focus: 3.2★ from 25 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fort Atkinson, 18 mi away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 53 Google reviews, listed on Google as “Heating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville
Ranked #18 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Heating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Milton, 8 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 52 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Whitewater, 18 mi away
Ranked #20 because of its Google rating and trade focus: 4.4★ from 31 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville
Ranked #21 because of its Google rating and trade focus: 4.2★ from 126 Google reviews, listed on Google as “Heating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Delavan, 21 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 145 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville
Ranked #23 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “HVAC contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Machesney Park, 18 mi away
Ranked #24 because of its Google rating and trade focus: 4.3★ from 24 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in South Beloit, 15 mi away
Ranked #25 because of its Google rating and trade focus: 4.0★ from 20 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#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 83 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 |
|---|---|---|
| 5 Start Plumbing Heating & Cooling | 3.0★ (2) | 13 mi |
| Better Heating & Air | 3.2★ (9) | 22 mi |
| Bob’s Custom Windows & Siding, Inc. | 4.8★ (29) | In Janesville |
| EB Mechanical LLC. | 5.0★ (1) | 12 mi |
| Four Seasons Comfort Systems | 3.8★ (4) | 9 mi |
| Germundson Heating & Cooling | 5.0★ (5) | 18 mi |
| Hess Heating & Cooling, LLC | 5.0★ (1) | 20 mi |
| Lake Country Heating & Cooling | 3.5★ (2) | 25 mi |
| Magee Plumbing Corp | 4.8★ (56) | In Janesville |
| Mlsna Gary & Son Heating & Air Conditioning | 4.4★ (7) | 22 mi |
| Preferred Home Repair & Services, LLC | In Janesville | |
| ProTech Plumbing, Heating, & Cooling | 4.3★ (6) | 25 mi |
| Right Choice Rooter & Plumbing | 4.8★ (264) | In Janesville |
| SE Cleaners LLC | 4.8★ (1,083) | In Janesville |
| SERVPRO of Rock County | 4.6★ (56) | In Janesville |
| The State Group Industrial USA Ltd | 5.0★ (2) | In Janesville |
| Thorne Heating and Cooling | 5.0★ (1) | In Janesville |
| Top Solutions Cooling & Heating | In Janesville | |
| TOTAL Mechanical, LLC Janesville | 5.0★ (1) | In Janesville |
| Westphal & Co Inc. | 4.6★ (27) | In Janesville |
National price ranges in USD, not adjusted for Janesville. 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 Wisconsin, 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 83 Janesville 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 23, 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 Janesville 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 |