84 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Monona: All Comfort Services, CR Score 94/100; 4.8★ from 3,441 Google reviews; open 24/7.
Best for emergencies (open 24/7): Cardinal Heating, Cooling, Plumbing & Electric, posts 24/7 hours; ranked #2 of 84.
Most-reviewed: Cardinal Heating, Cooling, Plumbing & Electric, 4,888 Google reviews at 4.9★, the most of 84 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
84 Monona HVAC contractors are ranked here by CR Score, from 8 published factors. 23 are open 24/7, 38 open Saturdays and 32 open Sundays, based on posted hours. The median Google rating is 4.8★ across 84 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | All Comfort Services | 94 | 4.8★ (3,441) | Madison, 3 mi away | 24/7 | Overall |
| 2 | Cardinal Heating, Cooling, Plumbing & Electric | 94 | 4.9★ (4,888) | Sun Prairie, 8 mi away | 24/7 | Emergencies, Most reviews |
| 3 | Harker Heating & Cooling | 94 | 4.9★ (1,721) | Madison, 2 mi away | 24/7 | — |
| 4 | Action Plumbing, Heating, Air Conditioning and Electric, Inc. | 92 | 4.9★ (1,042) | Madison, 6 mi away | 24/7 | — |
| 5 | RG Heating Cooling Plumbing | 92 | 4.9★ (1,820) | Waunakee, 10 mi away | 24/7 | — |
| 6 | Aire Serv of Madison | 92 | 4.9★ (497) | McFarland, 3 mi away | 24/7 | — |
| 7 | Cardinal Heating, Cooling, Plumbing, & Electric | 91 | 5.0★ (388) | Fitchburg, 8 mi away | 24/7 | — |
| 8 | TradeWinds Heating & Air Conditioning Inc. | 91 | 5.0★ (223) | Madison, 4 mi away | 24/7 | — |
| 9 | Southport Home Services | 91 | 4.9★ (174) | Madison, 2 mi away | 24/7 | — |
| 10 | High Tech Heating & A/C, Inc. | 90 | 4.9★ (362) | Cottage Grove, 8 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and availability: 4.8★ from 3,441 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sun Prairie, 8 mi away
Ranked #2 because of its Google rating and review volume: 4.9★ from 4,888 Google reviews, the most Google reviews on this list (4,888).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 2 mi away
Ranked #3 because of its Google rating and availability: 4.9★ from 1,721 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 6 mi away
Ranked #4 because of its Google rating and availability: 4.9★ from 1,042 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Waunakee, 10 mi away
Ranked #5 because of its Google rating and availability: 4.9★ from 1,820 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in McFarland, 3 mi away
Ranked #6 because of its Google rating and availability: 4.9★ from 497 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fitchburg, 8 mi away
Ranked #7 because of its Google rating and availability: 5.0★ from 388 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 4 mi away
Ranked #8 because of its Google rating and availability: 5.0★ from 223 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 2 mi away
Ranked #9 because of its Google rating and availability: 4.9★ from 174 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Cottage Grove, 8 mi away
Ranked #10 because of its Google rating and availability: 4.9★ from 362 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 3 mi away
Ranked #11 because of its Google rating and availability: 5.0★ from 91 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sun Prairie, 9 mi away
Ranked #12 because of its Google rating and availability: 4.7★ from 1,128 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Middleton, 10 mi away
Ranked #13 because of its Google rating and availability: 4.9★ from 200 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Verona, 12 mi away
Ranked #14 because of its Google rating and availability: 4.8★ from 261 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 1 mi away
Ranked #15 because of its Google rating and availability: 4.5★ from 24 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Waunakee, 11 mi away
Ranked #16 because of its Google rating and availability: 4.8★ from 45 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Stoughton, 11 mi away
Ranked #17 because of its Google rating and availability: 4.6★ from 62 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 4 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 43 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sun Prairie, 12 mi away
Ranked #19 because of its Google rating and availability: 4.7★ from 33 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 14 mi away
Ranked #20 because of its Google rating and availability: 4.9★ from 21 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 6 mi away
Ranked #21 because of its Google rating and trade focus: 4.8★ from 45 Google reviews, listed on Google as “HVAC contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Sun Prairie, 10 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 on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 3 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 37 Google reviews, listed on Google as “HVAC contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Mishawaka, 13 mi away
Ranked #24 because of its Google rating and availability: 5.0★ from 17 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fitchburg, 6 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #26 to #41, in CR Score order; each links to its profile. We publish the top 41 of 84 ranked HVAC contractors here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Robert's Plumbing & Heating INC | 82 | 4.5★ (32) | 3 mi |
| 27 | Madison Refrigeration & Heating | 82 | 3.2★ (13) | 2 mi |
| 41 | GH Heating & Air, L.L.C. | 79 | 4.1★ (17) | 20 mi |
National price ranges in USD, not adjusted for Monona. 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 84 Monona 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 Monona 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 |