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TRUSTED BY SULLIVAN, WI HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon202
    Verified heating and air conditioning services reviews

Verified Reviews for Heating And Air Conditioning Service pros in Sullivan, WI

*The Angi rating for Heating And Air Conditioning Service companies in Sullivan, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Sullivan, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

Last update on February 13, 2026

Find Heating and air conditioning pros in Sullivan

Avatar for KETTLE MORAINE HEATING & AIR CONDITIONING LLC
KETTLE MORAINE HEATING & AIR CONDITIONING LLC
4.8(
196
)

Serving Sullivan, WI and surrounding areas

Approved

In business since 1987

Free estimates

Emergency services offered

"After trying several other HVAC service companies, I have been using Kettle Moraine HVAC for many years now In the past they have always been very professional and quick to react to help out with any problem that has come up. This service call was a furnace/humidifier tuneup for what is a ‘new’ system for us due to a move. Doug was very prompt and had all items necessary for the job. I greatly appreciated his professional and that he took the time to show me what he was doing and to instruct me in what I should be looking for to prevent problems. He was also very patient in showing me what I can do to help my system to continue to run efficiently and effectively. I highly recommend Kettle Moraine HVAC."
Radiant In floor Heating
Furnace Replacement with Humidifier
Additional Photos
Additional Photos
Additional Photos

+8

Response time2 days
14 neighbors recently requested a quote
Recommended by64%of homeowners
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Avatar for JB Mechanical, LLC
JB Mechanical, LLC
4.9(
29
)

Serving Sullivan, WI and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"Very knowledgeable, friendly and worked through the day until the job was done. Great choice for residential HVAC."
Response time1 day
13 neighbors recently requested a quote
Recommended by96%of homeowners
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Avatar for Southport Home Services
Southport Home Services
5.0(
11
)

Serving Sullivan, WI and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Justin took care to not over sell me. Only what I needed and understood. The install team were tidy, efficient, and educated me about the safety approaches when changing the humidifier filter. That filter and the furnace filter are the same that was used on my old system. They were professional and personable."
Boiler
Upstairs Furnace
Lineset/Electrical
Basement Furnace
Air Conditioner

+11

34 neighbors recently requested a quote
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Avatar for Countryside Heating and Cooling, LLC
Countryside Heating and Cooling, LLC
5.0(
6
)

Serving Sullivan, WI and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

We are a small family owned business located in Pewaukee. Call us today for all of your heating, cooling, boiler, and hydronic heating needs. Licensed, insured, and accredited with the Better Business Bureau.

Heating the Dream Barn
Heating the Dream Barn
Heating the Dream Barn
2024 Nextdoor Fave Award
2024 Nextdoor Fave Award

+2

Response time1 day
5 neighbors recently requested a quote
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Avatar for Over the Moon Heating, Air & Electric
Over the Moon Heating, Air & Electric
3.6(
15
)

Serving Sullivan, WI and surrounding areas

Approved

In business since 2009

Emergency services offered

Warranties offered

"I had the Team out to perform and AC service and Furnace tune up. With such great service and comparable pricing I ended up moving forward with duct cleaning services. The guys were friendly and professional they were also nice to my doberman."
Team & Job Photos
Team & Job Photos
Team & Job Photos
Team & Job Photos
Team & Job Photos

+51

Response time4 hrs
100 neighbors recently requested a quote
Recommended by54%of homeowners
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Sears Heating and Cooling - Milwaukee
4.3(
23
)

Serving Sullivan, WI and surrounding areas

In business since 1893

Free estimates

Warranties offered

"Very prefessional and thorough. Left my place clean after the install, and even loaned me some goo-be-gone from their toolbox for a project that I was working on while they were installing my furnace. They reviewed what they did at the end, and gave me a card so that I could call with any issues. Would highly recommend Sears and their contractors."
Recommended by89%of homeowners
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Heating and Air Conditioning questions, answered by experts

A non-maintained AC is more likely to perform poorly, increase your energy bills, and undergo more severe issues like breakage and water damage. That’s why DIY cleaning or professional maintenance is recommended annually. Otherwise, you might end up paying more in the end than you would for annual service. You can purchase cheap AC cleaning kits if you prefer going the DIY route.

In most cases, homeowners insurance will cover an AC replacement if it was damaged due to a covered peril—such as theft, fire, or storms. So, if your air conditioner needs replacing due to regular wear and tear, your insurance company probably won’t pay for a new one. However, home warranties often cover HVAC repairs and replacements.

Yes, a dehumidifier and air conditioner can be used simultaneously in a home. A dehumidifier can bolster an air conditioner’s efficiency. Typically, a dehumidifier is used when the air conditioner alone cannot keep a home’s humidity levels at a comfortable indoor humidity level, which should, ideally, be between 30% and 50%.

You should plan to change your AC unit's filter every one to three months, depending on the manufacturer's recommendations. You should also clean the coils at least once per year, but if you have pets or someone in your household has allergies, you might need to clean them more often. Fortunately, many pros will clean the coils and change the filter for you during an inspection, which you should schedule once or twice per year.

It depends on the size of the space you’re cooling down. If you’re looking for the most affordable way to cool an entire house over a long period of time, then central air will be more cost-effective. But when it comes to cooling down a couple of rooms or one floor, a window unit may be the cheaper option, with both a lower cost to install and less energy used to run.

The Sullivan, WI homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.

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