300 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Sussex: Interstate Heating Co., Inc., CR Score 65/100; 4.9★ from 932 Google reviews; open 24/7.
Best for emergencies (open 24/7): Kettle Moraine Heating & Air Conditioning, LLC, posts 24/7 hours; ranked #2 of 300.
Most-reviewed: Mr. Holland's Home Services, 7,086 Google reviews at 4.8★, the most of 300 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
300 Sussex HVAC contractors are ranked here by CR Score, from ten published factors. 123 are open 24/7, 180 open Saturdays and 149 open Sundays, based on posted hours. The median Google rating is 4.9★ across 300 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Interstate Heating Co., Inc. | 65 | 4.9★ (932) | Sussex | 24/7 | Overall |
| 2 | Kettle Moraine Heating & Air Conditioning, LLC | 64 | 4.9★ (4,102) | Delafield, 12 mi away | 24/7 | Emergencies |
| 3 | Mr. Holland's Home Services | 64 | 4.8★ (7,086) | Jackson, 13 mi away | 24/7 | Most reviews |
| 4 | HoneyCreek Heating, Cooling & Electric, LLC | 64 | 5.0★ (279) | Sussex | 24/7 | — |
| 5 | Quality Heating, Cooling, Plumbing & Electric | 64 | 4.9★ (1,113) | Brookfield, 6 mi away | 24/7 | — |
| 6 | Capital Heating, Cooling, Electric, and Plumbing | 64 | 4.7★ (2,977) | Menomonee Falls, 7 mi away | 24/7 | — |
| 7 | Pat's Heating & Air Conditioning | 63 | 5.0★ (1,747) | Oconomowoc, 13 mi away | 24/7 | — |
| 8 | Thielmann Heating, Cooling & Plumbing | 63 | 4.9★ (1,665) | New Berlin, 13 mi away | 24/7 | — |
| 9 | New Berlin Heating & Air Conditioning | 63 | 4.9★ (1,158) | New Berlin, 11 mi away | 24/7 | — |
| 10 | Mr. Holland's Home Services | 63 | 4.8★ (1,334) | New Berlin, 11 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: 4.9★ from 932 Google reviews, listed on Google as “HVAC contractor”.
Based in Delafield, 12 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 4,102 Google reviews, listed on Google as “HVAC contractor”.
Based in Jackson, 13 mi away
Ranked #3 because of its Google rating and review volume: 4.8★ from 7,086 Google reviews, the most in Sussex.
Based in Sussex
Ranked #4 because of its Google rating and trade focus: 5.0★ from 279 Google reviews, listed on Google as “HVAC contractor”.
Based in Brookfield, 6 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 1,113 Google reviews, listed on Google as “HVAC contractor”.
Based in Menomonee Falls, 7 mi away
Ranked #6 because of its Google rating and trade focus: 4.7★ from 2,977 Google reviews, listed on Google as “HVAC contractor”.
Based in Oconomowoc, 13 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 1,747 Google reviews, listed on Google as “HVAC contractor”.
Based in New Berlin, 13 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 1,665 Google reviews, listed on Google as “HVAC contractor”.
Based in New Berlin, 11 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 1,158 Google reviews, listed on Google as “HVAC contractor”.
Based in New Berlin, 11 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 1,334 Google reviews, listed on Google as “HVAC contractor”.
Based in Waukesha, 6 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 262 Google reviews, listed on Google as “HVAC contractor”.
Based in Milwaukee, 13 mi away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 2,027 Google reviews, listed on Google as “HVAC contractor”.
Based in Brookfield, 8 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 482 Google reviews, listed on Google as “HVAC contractor”.
Based in Waukesha, 10 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 446 Google reviews, listed on Google as “HVAC contractor”.
Based in Waukesha, 7 mi away
Ranked #15 because of its Google rating and trade focus: 4.6★ from 1,249 Google reviews, listed on Google as “Furnace repair service”.
Based in Brookfield, 10 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 436 Google reviews, listed on Google as “HVAC contractor”.
Based in Germantown, 14 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 682 Google reviews, listed on Google as “HVAC contractor”.
Based in Hartland, 7 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 299 Google reviews, listed on Google as “HVAC contractor”.
Based in Brookfield, 9 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 383 Google reviews, listed on Google as “HVAC contractor”.
Based in West Allis, 12 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 5,231 Google reviews, listed on Google as “HVAC contractor”.
Based in Brookfield, 9 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 222 Google reviews, listed on Google as “HVAC contractor”.
Based in Muskego, 17 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 1,076 Google reviews, listed on Google as “HVAC contractor”.
Based in Mukwonago, 19 mi away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 2,376 Google reviews, listed on Google as “Air conditioning repair service”.
Based in Wauwatosa, 11 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 247 Google reviews, listed on Google as “HVAC contractor”.
Based in Waukesha, 7 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 156 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 300 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 |
|---|---|---|
| Air Maintenance Inc | 4.0★ (2) | 2 mi |
| Aire Serv of West Allis | 4.7★ (213) | 15 mi |
| All Star Heating & Cooling | 4.6★ (49) | 6 mi |
| Best Heating And Air Conditioning | 2.5★ (2) | 9 mi |
| BUILDING REPAIR SERVICE INC - Heating & Cooling | 5.0★ (2) | 16 mi |
| Envira-Tech Inc | 4.0★ (2) | 5 mi |
| Hanson Heating | 5.0★ (2) | 9 mi |
| HVAC Bay Furnace & AC Repair | 5.0★ (2) | 16 mi |
| IMI LLC | 5.0★ (2) | 14 mi |
| John Thielmann & Sons | 5.0★ (2) | 7 mi |
| Mack's Heating & Air Conditioning | 5.0★ (2) | 15 mi |
| Mequons Heating & Air Conditioning Installation | 5.0★ (2) | 8 mi |
| Pure Mecahnical | 5.0★ (2) | 7 mi |
| R J Refrigeration Inc | 5.0★ (2) | 6 mi |
| RJ Heating and Air Conditioning LLC | 4.7★ (195) | 13 mi |
| Tempco Inc Heating & Air Conditioning | 4.5★ (2) | 13 mi |
| TMS Service | 4.5★ (2) | 13 mi |
| Trane Milwaukee Sales Office | 2.5★ (2) | 17 mi |
| W H Jacklin Inc | 3.0★ (2) | 10 mi |
| West Allis Heating, Cooling, Plumbing, and Electrical | 4.8★ (2,148) | 14 mi |
National price ranges in USD, not adjusted for Sussex. 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 300 Sussex 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 Sussex 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 |