65/100CR Score
Ranked #1 because of its Google rating and review volume: 4.8★ from 7,086 Google reviews, the most in Hartford.
- 4.8★ from 7,086 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- W204N16635 Jackson Dr, Jackson, WI 53037
Best HVAC Contractors in Hartford, WI (2026)
172 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Hartford: Mr. Holland's Home Services, CR Score 65/100; 4.8★ from 7,086 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Thielmann Heating, Cooling & Plumbing, posts 24/7 hours; ranked #2 of 172.
- 5
Most-reviewed: Kettle Moraine Heating & Air Conditioning, LLC, 4,102 Google reviews at 4.9★, the most of 172 ranked after Mr. Holland's Home Services; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
172 Hartford HVAC contractors are ranked here by CR Score, from ten published factors. 65 are open 24/7, 91 open Saturdays and 76 open Sundays, based on posted hours. The median Google rating is 4.9★ across 172 rated businesses.
Top 10 HVAC contractors in Hartford at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Mr. Holland's Home Services | 65 | 4.8★ (7,086) | Jackson, 11 mi away | 24/7 | Overall |
| 2 | Thielmann Heating, Cooling & Plumbing | 63 | 4.9★ (409) | Slinger, 4 mi away | 24/7 | Emergencies |
| 3 | JM Heating and Cooling | 63 | 5.0★ (272) | Slinger, 4 mi away | 24/7 | — |
| 4 | Pat's Heating & Air Conditioning | 62 | 5.0★ (1,747) | Oconomowoc, 18 mi away | 24/7 | — |
| 5 | Kettle Moraine Heating & Air Conditioning, LLC | 62 | 4.9★ (4,102) | Delafield, 21 mi away | 24/7 | Most reviews |
| 6 | Interstate Heating Co., Inc. | 61 | 4.9★ (932) | Sussex, 16 mi away | 24/7 | — |
| 7 | Albiero Plumbing & HVAC | 61 | 4.8★ (721) | West Bend, 13 mi away | 24/7 | — |
| 8 | Capital Heating, Cooling, Electric, and Plumbing | 61 | 4.7★ (2,977) | Menomonee Falls, 21 mi away | 24/7 | — |
| 9 | Quality Heating, Cooling, Plumbing & Electric | 60 | 4.9★ (1,113) | Brookfield, 21 mi away | 24/7 | — |
| 10 | Professional Services Heating, AC & Electric Repair | 60 | 5.0★ (682) | Germantown, 21 mi away | 24/7 | — |
The 172 best HVAC contractors in Hartford, ranked
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.
Based in Slinger, 4 mi away
63/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.9★ from 409 Google reviews, listed on Google as “HVAC contractor”.
- 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 Slinger, 4 mi away
63/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 272 Google reviews, listed on Google as “HVAC contractor”.
- 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 Oconomowoc, 18 mi away
62/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 1,747 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 1,747 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1833 Executive Dr, Oconomowoc, WI 53066
Based in Delafield, 21 mi away
62/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 4,102 Google reviews, listed on Google as “HVAC contractor”.
- 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 Sussex, 16 mi away
61/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.9★ from 932 Google reviews, listed on Google as “HVAC contractor”.
- 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 West Bend, 13 mi away
61/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.8★ from 721 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 721 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1940 N Main St, West Bend, WI 53090
Based in Menomonee Falls, 21 mi away
61/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.7★ from 2,977 Google reviews, listed on Google as “HVAC contractor”.
- 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 Brookfield, 21 mi away
60/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.9★ from 1,113 Google reviews, listed on Google as “HVAC contractor”.
- 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 Germantown, 21 mi away
60/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 682 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 682 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 113 Riverview Dr, Thiensville, WI 53092
Based in Sussex, 16 mi away
60/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 279 Google reviews, listed on Google as “HVAC contractor”.
- 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 Milwaukee, 23 mi away
60/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.8★ from 2,027 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 2,027 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 8232 N Teutonia Ave, Milwaukee, WI 53209
Based in Hartland, 15 mi away
60/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.9★ from 299 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 299 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 540 Norton Dr, Hartland, WI 53029
Based in Oconomowoc, 16 mi away
60/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.9★ from 291 Google reviews, listed on Google as “HVAC contractor”.
- 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 Port Washington, 25 mi away
60/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.9★ from 1,382 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,382 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1100 Bywater Dr #100, Port Washington, WI 53074
Based in Grafton, 21 mi away
59/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.9★ from 445 Google reviews, listed on Google as “Furnace repair service”.
- 4.9★ from 445 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1201 6th Ave, Grafton, WI 53024
Based in Hartford
59/100CR ScoreRanked #17 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 11 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
#18 TRAG HVAC, LLC
Based in Beaver Dam, 7 mi away
59/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 35 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 35 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Waukesha, 24 mi away
59/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 446 Google reviews, listed on Google as “HVAC contractor”.
- 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 Germantown, 14 mi away
59/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.9★ from 1,135 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,135 Google reviews
- Hours
- Mon–Fri 7 AM–5 PM · Sat 8 AM–12 PM · Sun closed
- Address
- W197N10225 Appleton Ave, Germantown, WI 53022
Based in Waukesha, 21 mi away
59/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 262 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 262 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- W220N1560 Jericho Ct, Waukesha, WI 53186
Based in Brookfield, 23 mi away
59/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 482 Google reviews, listed on Google as “HVAC contractor”.
- 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 Hartland, 15 mi away
59/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.8★ from 1,804 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 1,804 Google reviews
- Hours
- Mon–Fri 7 AM–5 PM · Sat 8 AM–12 PM · Sun closed
- Address
- 530 Norton Dr, Hartland, WI 53029
Based in Waukesha, 22 mi away
58/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.6★ from 1,249 Google reviews, listed on Google as “Furnace repair service”.
- 4.6★ from 1,249 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 20711 Watertown Rd Suite D, Waukesha, WI 53186
Based in Mequon, 24 mi away
58/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.9★ from 487 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 487 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 11512 N Port Washington Rd Suite 201K, Mequon, WI 53092
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 172 ranked HVAC contractors here; the rest are on their profiles.
Also serving Hartford
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 |
|---|---|---|
| Action Heating & Cooling | 4.2★ (152) | 25 mi |
| Air Maintenance Inc | 4.0★ (2) | 17 mi |
| All Hours Heating & Air Conditioning | In Hartford | |
| American Exchanger Services, Inc | 1.0★ (1) | In Hartford |
| Badgerland Plumbing | 4.1★ (28) | In Hartford |
| Best Heating And Air Conditioning | 2.5★ (2) | 23 mi |
| Bredan Mechanical Systems | 5.0★ (2) | 24 mi |
| Countryside Heating and Cooling | 4.9★ (56) | 23 mi |
| Envira-Tech Inc | 4.0★ (2) | 20 mi |
| Hanson Heating | 5.0★ (2) | 15 mi |
| Joe DeBelak Plumbing & Heating Co Inc | 4.0★ (64) | 17 mi |
| John Thielmann & Sons | 5.0★ (2) | 18 mi |
| Lewis Heating and Cooling | 5.0★ (14) | 17 mi |
| Mequons Heating & Air Conditioning Installation | 5.0★ (2) | 22 mi |
| MJS Heating & Air Conditioning | 4.5★ (32) | 18 mi |
| Pure Mecahnical | 5.0★ (2) | 21 mi |
| R J Refrigeration Inc | 5.0★ (2) | 20 mi |
| The Air MD, LLC. | In Hartford | |
| W H Jacklin Inc | 3.0★ (2) | 21 mi |
| ZIM Heating and Cooling | 4.8★ (53) | 25 mi |
How much do HVAC contractors cost in Hartford?
National price ranges in USD, not adjusted for Hartford. 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 Hartford HVAC contractors
We scored 172 Hartford 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 Hartford 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 |
HVAC contractors in Hartford: frequently asked questions
Who is the best HVAC contractor in Hartford?
By CR Score, the highest-ranked HVAC contractor in Hartford, WI is Mr. Holland's Home Services with a CR Score of 65/100. It has 4.8★ from 7,086 Google reviews. It is open 24/7. Thielmann Heating, Cooling & Plumbing (#2) and JM Heating and Cooling (#3) follow. We ranked 172 HVAC contractors on ten factors, last updated October 23, 2026.
How many HVAC contractors are there in Hartford?
ContractorsRanked ranks 172 HVAC contractors serving Hartford, WI. 1 of them is based in Hartford; 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 Hartford are open 24/7?
65 ranked HVAC contractors in Hartford post 24/7 hours. The highest-ranked are Mr. Holland's Home Services (#1), Thielmann Heating, Cooling & Plumbing (#2) and JM Heating and Cooling (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which HVAC contractors in Hartford work on weekends?
91 of 172 ranked HVAC contractors post Saturday hours and 76 post Sunday hours. The highest-ranked open Saturdays are Mr. Holland's Home Services (#1), Thielmann Heating, Cooling & Plumbing (#2) and JM Heating and Cooling (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does ac replacement cost in Hartford?
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 Hartford. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Hartford HVAC contractors have?
The median Google rating among 172 rated HVAC contractors in Hartford is 4.9★, with a median of 33 reviews. Mr. Holland's Home Services has the most, 7,086 reviews, and ranks #1. 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 Hartford?
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 ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Update log for Hartford
- October 2026: CR Scores recalculated for 172 hvac contractors serving Hartford.
More HVAC contractors and Hartford pages
HVAC contractors near Hartford
- HVAC contractors in Slinger, WI192 ranked
- HVAC contractors in Richfield, WI259 ranked
- HVAC contractors in Jackson, WI226 ranked
- HVAC contractors in West Bend, WI124 ranked
- HVAC contractors in Hartland, WI287 ranked
- HVAC contractors in Germantown, WI280 ranked
- HVAC contractors in Sussex, WI300 ranked
- HVAC contractors in Oconomowoc, WI185 ranked
- HVAC contractors in Menomonee Falls, WI296 ranked
- HVAC contractors in Pewaukee, WI303 ranked
Other trades in Hartford
- Roofers in Hartford418 ranked
- Plumbers in Hartford138 ranked
- Electricians in Hartford129 ranked
- General contractors in Hartford193 ranked
- Painters in Hartford25 ranked
- Landscapers in Hartford65 ranked
- Handymen in Hartford13 ranked
- Kitchen remodelers in Hartford115 ranked
- Bathroom remodelers in Hartford123 ranked
- Flooring contractors in Hartford111 ranked
- Tile installers in Hartford5 ranked
- Drywall contractors in Hartford5 ranked
- Concrete contractors in Hartford119 ranked
- Fence contractors in Hartford30 ranked
- Deck builders in Hartford51 ranked
- Siding contractors in Hartford224 ranked
- Window installers in Hartford195 ranked
- Gutter installers in Hartford81 ranked
- Insulation contractors in Hartford26 ranked
- Solar installers in Hartford15 ranked
- Garage door repair companies in Hartford31 ranked
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- Tree services in Hartford182 ranked
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- Water damage restoration companies in Hartford143 ranked
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- All contractors in Hartford