95/100CR Score
Ranked #1 because of its Google rating and availability: 5.0★ from 1,747 Google reviews, open 24/7.
- 5.0★ from 1,747 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1833 Executive Dr, Oconomowoc, WI 53066
Best HVAC Contractors in Oconomowoc, WI (2026)
185 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Oconomowoc: Pat's Heating & Air Conditioning, CR Score 95/100; 5.0★ from 1,747 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Kettle Moraine Heating & Air Conditioning, LLC, posts 24/7 hours; ranked #2 of 185.
- 7
Most-reviewed: Mr. Holland's Home Services, 7,086 Google reviews at 4.8★, the most of 185 ranked; ranked #7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
185 Oconomowoc HVAC contractors are ranked here by CR Score, from 8 published factors. 79 are open 24/7, 104 open Saturdays and 88 open Sundays, based on posted hours. The median Google rating is 4.9★ across 185 rated businesses.
Top 10 HVAC contractors in Oconomowoc at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Pat's Heating & Air Conditioning | 95 | 5.0★ (1,747) | Oconomowoc | 24/7 | Overall |
| 2 | Kettle Moraine Heating & Air Conditioning, LLC | 93 | 4.9★ (4,102) | Delafield, 9 mi away | 24/7 | Emergencies |
| 3 | Aire Serv of Oconomowoc | 92 | 4.9★ (291) | Oconomowoc | 24/7 | — |
| 4 | Alpha Heating & Cooling LLC | 90 | 4.9★ (117) | Oconomowoc | 24/7 | — |
| 5 | Interstate Heating Co., Inc. | 90 | 4.9★ (932) | Sussex, 13 mi away | 24/7 | — |
| 6 | Dave Droegkamp Heating, Cooling & Air Quality | 90 | 4.9★ (299) | Hartland, 8 mi away | 24/7 | — |
| 7 | Mr. Holland's Home Services | 90 | 4.8★ (7,086) | Jackson, 22 mi away | 24/7 | Most reviews |
| 8 | Kelchner's Arctic Air | 89 | 4.9★ (63) | Oconomowoc | 24/7 | — |
| 9 | On Time Heating & Cooling | 89 | 5.0★ (446) | Waukesha, 16 mi away | 24/7 | — |
| 10 | Quality Heating, Cooling, Plumbing & Electric | 89 | 4.9★ (1,113) | Brookfield, 18 mi away | 24/7 | — |
The 185 best HVAC contractors in Oconomowoc, ranked
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Delafield, 9 mi away
93/100CR ScoreRanked #2 because of its Google rating and availability: 4.9★ from 4,102 Google reviews, open 24/7.
- 4.9★ from 4,102 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- W325 S1767, Mickle Rd, Delafield, WI 53018
Based in Oconomowoc
92/100CR ScoreRanked #3 because of its Google rating and availability: 4.9★ from 291 Google reviews, open 24/7.
- 4.9★ from 291 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 535 E Wisconsin Ave, Oconomowoc, WI 53066
Based in Oconomowoc
90/100CR ScoreRanked #4 because of its Google rating and availability: 4.9★ from 117 Google reviews, open 24/7.
- 4.9★ from 117 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- S15W33816 Wolf Rd # G, Oconomowoc, WI 53066
Based in Sussex, 13 mi away
90/100CR ScoreRanked #5 because of its Google rating and availability: 4.9★ from 932 Google reviews, open 24/7.
- 4.9★ from 932 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- N53 W24950 S Corporate Cir, Sussex, WI 53089
Based in Hartland, 8 mi away
90/100CR ScoreRanked #6 because of its Google rating and availability: 4.9★ from 299 Google reviews, open 24/7.
- 4.9★ from 299 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 540 Norton Dr, Hartland, WI 53029
Based in Jackson, 22 mi away
90/100CR ScoreRanked #7 because of its Google rating and review volume: 4.8★ from 7,086 Google reviews, the most Google reviews on this list (7,086).
- 4.8★ from 7,086 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- W204N16635 Jackson Dr, Jackson, WI 53037
Based in Oconomowoc
89/100CR ScoreRanked #8 because of its Google rating and availability: 4.9★ from 63 Google reviews, open 24/7.
- 4.9★ from 63 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- W1536 County Rd B, Sullivan, WI 53178
Based in Waukesha, 16 mi away
89/100CR ScoreRanked #9 because of its Google rating and availability: 5.0★ from 446 Google reviews, open 24/7.
- 5.0★ from 446 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 323 W Sunset Dr, Waukesha, WI 53189
Based in Brookfield, 18 mi away
89/100CR ScoreRanked #10 because of its Google rating and availability: 4.9★ from 1,113 Google reviews, open 24/7.
- 4.9★ from 1,113 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2840 N Brookfield Rd Ste 2, Brookfield, WI 53045
Based in Mukwonago, 19 mi away
89/100CR ScoreRanked #11 because of its Google rating and availability: 4.8★ from 2,376 Google reviews, open 24/7.
- 4.8★ from 2,376 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 421 McKenzie Dr, Mukwonago, WI 53149
Based in Delafield, 7 mi away
89/100CR ScoreRanked #12 because of its Google rating and availability: 4.9★ from 149 Google reviews, open 24/7.
- 4.9★ from 149 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 132 W Ottawa Ave bldg b, Dousman, WI 53118
Based in New Berlin, 21 mi away
89/100CR ScoreRanked #13 because of its Google rating and availability: 4.9★ from 1,665 Google reviews, open 24/7.
- 4.9★ from 1,665 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 17020 W National Ave, New Berlin, WI 53151
Based in Sussex, 15 mi away
88/100CR ScoreRanked #14 because of its Google rating and availability: 5.0★ from 279 Google reviews, open 24/7.
- 5.0★ from 279 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- N63W22633 Main St Ste. 107, Sussex, WI 53089
Based in Waukesha, 16 mi away
88/100CR ScoreRanked #15 because of its Google rating and availability: 5.0★ from 262 Google reviews, open 24/7.
- 5.0★ from 262 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- W220N1560 Jericho Ct, Waukesha, WI 53186
Based in New Berlin, 22 mi away
88/100CR ScoreRanked #16 because of its Google rating and availability: 4.9★ from 1,158 Google reviews, open 24/7.
- 4.9★ from 1,158 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1910 S Sunny Slope Rd, New Berlin, WI 53151
Based in Menomonee Falls, 21 mi away
88/100CR ScoreRanked #17 because of its Google rating and availability: 4.7★ from 2,977 Google reviews, open 24/7.
- 4.7★ from 2,977 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- W134 N5368 Campbell Dr, Menomonee Falls, WI 53051
Based in Muskego, 23 mi away
88/100CR ScoreRanked #18 because of its Google rating and availability: 4.9★ from 1,076 Google reviews, open 24/7.
- 4.9★ from 1,076 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- S82W19246 Apollo Dr Unit B, Muskego, WI 53150
Based in New Berlin, 21 mi away
88/100CR ScoreRanked #19 because of its Google rating and availability: 4.8★ from 1,334 Google reviews, open 24/7.
- 4.8★ from 1,334 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2400 S Commerce Dr, New Berlin, WI 53151
Based in Slinger, 18 mi away
87/100CR ScoreRanked #20 because of its Google rating and availability: 5.0★ from 272 Google reviews, open 24/7.
- 5.0★ from 272 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 122 W Commerce Blvd Unit C, Slinger, WI 53086
Based in Slinger, 18 mi away
87/100CR ScoreRanked #21 because of its Google rating and availability: 4.9★ from 409 Google reviews, open 24/7.
- 4.9★ from 409 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 105 W Commerce Blvd, Slinger, WI 53086
Based in Hartland, 5 mi away
87/100CR ScoreRanked #22 because of its Google rating and availability: 5.0★ from 32 Google reviews, open 24/7.
- 5.0★ from 32 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- N55 W33342, Terrace Dr, Nashotah, WI 53058
Based in Brookfield, 20 mi away
87/100CR ScoreRanked #23 because of its Google rating and availability: 4.9★ from 482 Google reviews, open 24/7.
- 4.9★ from 482 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 405 N Calhoun Rd, Brookfield, WI 53005
Based in Brookfield, 22 mi away
87/100CR ScoreRanked #24 because of its Google rating and availability: 5.0★ from 436 Google reviews, open 24/7.
- 5.0★ from 436 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 120 Bishops Way, Brookfield, WI 53005
Based in Waukesha, 13 mi away
87/100CR ScoreRanked #25 because of its Google rating and availability: 4.9★ from 156 Google reviews, open 24/7.
- 4.9★ from 156 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2607 N Grandview Blvd suite 160G, Waukesha, WI 53188
HVAC contractors ranked #26 to #50
#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 185 ranked HVAC contractors here; the rest are on their profiles.
Also serving Oconomowoc
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) | 15 mi |
| All State Heating & Air Conditioning | 5.0★ (1) | 7 mi |
| Arctic Air LLC | 5.0★ (1) | 8 mi |
| Beckers Heating and Air | 5.0★ (1) | In Oconomowoc |
| Behm Heating & Cooling, LLC | 5.0★ (7) | 12 mi |
| Best Heating And Air Conditioning | 2.5★ (2) | 22 mi |
| Bittner Heating & Cooling | 5.0★ (2) | 23 mi |
| Bredan Mechanical Systems | 5.0★ (2) | 15 mi |
| Envira-Tech Inc | 4.0★ (2) | 15 mi |
| Great Lakes Heating & Cooling, LLC | 5.0★ (5) | In Oconomowoc |
| Hanson Heating | 5.0★ (2) | 5 mi |
| John Thielmann & Sons | 5.0★ (2) | 21 mi |
| Lake Country Heating & Cooling | 3.5★ (2) | 17 mi |
| Mequons Heating & Air Conditioning Installation | 5.0★ (2) | 22 mi |
| Premium Heating & Cooling | 5.0★ (40) | 24 mi |
| Pure Mecahnical | 5.0★ (2) | 16 mi |
| R J Refrigeration Inc | 5.0★ (2) | 19 mi |
| Sterling Mainz & Sons Plumbing | 4.4★ (40) | In Oconomowoc |
| TMS Service | 4.5★ (2) | 22 mi |
| W H Jacklin Inc | 3.0★ (2) | 24 mi |
How much do HVAC contractors cost in Oconomowoc?
National price ranges in USD, not adjusted for Oconomowoc. 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 |
When to hire an HVAC contractor in Wisconsin
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.
How we ranked Oconomowoc HVAC contractors
We scored 185 Oconomowoc 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 Oconomowoc 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 |
HVAC contractors in Oconomowoc: frequently asked questions
Who is the best HVAC contractor in Oconomowoc?
By CR Score, the highest-ranked HVAC contractor in Oconomowoc, WI is Pat's Heating & Air Conditioning with a CR Score of 95/100. It has 5.0★ from 1,747 Google reviews. It is open 24/7. Kettle Moraine Heating & Air Conditioning, LLC (#2) and Aire Serv of Oconomowoc (#3) follow. We ranked 185 HVAC contractors on 8 factors, last updated October 22, 2026.
How many HVAC contractors are there in Oconomowoc?
ContractorsRanked ranks 185 HVAC contractors serving Oconomowoc, WI. 7 of them are based in Oconomowoc; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which HVAC contractors in Oconomowoc are open 24/7?
79 ranked HVAC contractors in Oconomowoc post 24/7 hours. The highest-ranked are Pat's Heating & Air Conditioning (#1), Kettle Moraine Heating & Air Conditioning, LLC (#2) and Aire Serv of Oconomowoc (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which HVAC contractors in Oconomowoc work on weekends?
104 of 185 ranked HVAC contractors post Saturday hours and 88 post Sunday hours. The highest-ranked open Saturdays are Pat's Heating & Air Conditioning (#1), Kettle Moraine Heating & Air Conditioning, LLC (#2) and Aire Serv of Oconomowoc (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does ac replacement cost in Oconomowoc?
AC replacement typically costs $3,887 to $8,073, with $5,978 typical (Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range). This is a national range, not adjusted for Oconomowoc. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Oconomowoc HVAC contractors have?
The median Google rating among 185 rated HVAC contractors in Oconomowoc is 4.9★, with a median of 33 reviews. Mr. Holland's Home Services has the most, 7,086 reviews, and ranks #7. We adjust ratings for review count, so a few five-star reviews cannot top the list.
When is the best time to hire an HVAC contractor in Oconomowoc?
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.
How does ContractorsRanked rank HVAC contractors?
Each HVAC contractor gets a 0–100 CR Score from 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Update log for Oconomowoc
- October 2026: CR Scores recalculated for 185 hvac contractors serving Oconomowoc.
- October 2026: 1 duplicate listing merged.
More HVAC contractors and Oconomowoc pages
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