88 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Lake Mills: Cardinal Heating, Cooling, Plumbing & Electric, CR Score 64/100; 4.9★ from 4,888 Google reviews; open 24/7.
Best for emergencies (open 24/7): All Comfort Services, posts 24/7 hours; ranked #2 of 88.
Most-reviewed: All Comfort Services, 3,441 Google reviews at 4.8★, the most of 88 ranked after Cardinal Heating, Cooling, Plumbing & Electric; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
88 Lake Mills HVAC contractors are ranked here by CR Score, from ten published factors. 29 are open 24/7, 42 open Saturdays and 39 open Sundays, based on posted hours. The median Google rating is 4.8★ across 88 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Cardinal Heating, Cooling, Plumbing & Electric | 64 | 4.9★ (4,888) | Sun Prairie, 19 mi away | 24/7 | Overall |
| 2 | All Comfort Services | 62 | 4.8★ (3,441) | Madison, 19 mi away | 24/7 | Emergencies, Most reviews |
| 3 | 24HR Home Comfort Services | 62 | 4.9★ (2,863) | Milton, 21 mi away | 24/7 | — |
| 4 | Pat's Heating & Air Conditioning | 62 | 5.0★ (1,747) | Oconomowoc, 22 mi away | 24/7 | — |
| 5 | High Tech Heating & A/C, Inc. | 61 | 4.9★ (362) | Cottage Grove, 14 mi away | 24/7 | — |
| 6 | Harker Heating & Cooling | 61 | 4.9★ (1,721) | Madison, 23 mi away | 24/7 | — |
| 7 | Action Plumbing, Heating, Air Conditioning and Electric, Inc. | 61 | 4.7★ (1,128) | Sun Prairie, 17 mi away | 24/7 | — |
| 8 | Aire Serv of Madison | 60 | 4.9★ (497) | McFarland, 20 mi away | 24/7 | — |
| 9 | TradeWinds Heating & Air Conditioning Inc. | 59 | 5.0★ (223) | Madison, 21 mi away | 24/7 | — |
| 10 | Aire Serv of Oconomowoc | 59 | 4.9★ (291) | Oconomowoc, 21 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 Lake Mills
Based in Sun Prairie, 19 mi away
Ranked #1 because of its Google rating and review volume: 4.9★ from 4,888 Google reviews, the most in Lake Mills.
Based in Madison, 19 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 3,441 Google reviews, listed on Google as “HVAC contractor”.
Based in Milton, 21 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 2,863 Google reviews, listed on Google as “HVAC contractor”.
Based in Oconomowoc, 22 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 1,747 Google reviews, listed on Google as “HVAC contractor”.
Based in Cottage Grove, 14 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 362 Google reviews, listed on Google as “HVAC contractor”.
Based in Madison, 23 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 1,721 Google reviews, listed on Google as “HVAC contractor”.
Based in Sun Prairie, 17 mi away
Ranked #7 because of its Google rating and trade focus: 4.7★ from 1,128 Google reviews, listed on Google as “HVAC contractor”.
Based in McFarland, 20 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 497 Google reviews, listed on Google as “HVAC contractor”.
Based in Madison, 21 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 223 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Oconomowoc, 21 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 291 Google reviews, listed on Google as “HVAC contractor”.
Based in Brookfield, 12 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 56 Google reviews, listed on Google as “HVAC contractor”.
Based in Madison, 20 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 174 Google reviews, listed on Google as “HVAC contractor”.
Based in Oconomowoc, 15 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 63 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Watertown, 12 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 1,166 Google reviews, listed on Google as “HVAC contractor”.
Based in Madison, 20 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 91 Google reviews, listed on Google as “HVAC contractor”.
Based in Delafield, 23 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 149 Google reviews, listed on Google as “HVAC contractor”.
Based in Jefferson, 7 mi away
Ranked #17 because of its Google rating and trade focus: 4.7★ from 36 Google reviews, listed on Google as “HVAC contractor”.
Based in Sun Prairie, 15 mi away
Ranked #18 because of its Google rating and trade focus: 4.7★ from 33 Google reviews, listed on Google as “HVAC contractor”.
Based in Fort Atkinson, 12 mi away
Ranked #19 because of its Google rating and trade focus: 4.8★ from 53 Google reviews, listed on Google as “Heating contractor”.
Based in Lake Mills
Ranked #20 because of its Google rating and review volume: 4.9★ from 646 Google reviews.
Based in Stoughton, 19 mi away
Ranked #21 because of its Google rating and trade focus: 4.6★ from 62 Google reviews, listed on Google as “HVAC contractor”.
Based in Sun Prairie, 18 mi away
Ranked #22 because of its Google rating and trade focus: 4.7★ from 89 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Madison, 19 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 21 Google reviews, listed on Google as “HVAC contractor”.
Based in Whitewater, 20 mi away
Ranked #24 because of its Google rating and trade focus: 4.4★ from 31 Google reviews, listed on Google as “HVAC contractor”.
Based in Madison, 21 mi away
Ranked #25 because of its Google rating and trade focus: 4.5★ from 24 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 88 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 Boiler | 5.0★ (1) | 16 mi |
| Action Plumbing Heating AC & Elec | 19 mi | |
| Altitude HVAC | 5.0★ (10) | 19 mi |
| Beckers Heating and Air | 5.0★ (1) | 18 mi |
| Butters Fetting Co | 5.0★ (1) | 8 mi |
| Capitol Air Systems Inc | 3.3★ (4) | 19 mi |
| Four Seasons Comfort Systems | 3.8★ (4) | 19 mi |
| Germundson Heating & Cooling | 5.0★ (5) | 20 mi |
| Hallin Services | 19 mi | |
| Hess Heating & Cooling, LLC | 5.0★ (1) | 13 mi |
| Lake Country Heating & Cooling | 3.5★ (2) | 7 mi |
| McCormick Refrigeration | 5.0★ (9) | 21 mi |
| Nextech | 17 mi | |
| PBBS Equipment Corporation | 1.0★ (1) | 15 mi |
| Robert's Plumbing & Heating INC | 4.5★ (32) | 20 mi |
| Roman Repairs | 9 mi | |
| S & S Plumbing, LLC | 4.2★ (5) | In Lake Mills |
| TEMP-AIR, Inc. | 5.0★ (3) | 13 mi |
| Thorne Heating and Cooling | 5.0★ (1) | 18 mi |
| Vyron Corporation | 5.0★ (1) | 19 mi |
National price ranges in USD, not adjusted for Lake Mills. 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 88 Lake Mills 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 Lake Mills 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 |