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Whether it’s keeping your home or business at the perfect temperature, ensuring the lights stay on, or taking care of your plumbing, we’re here for all your repair, replacement, and maintenance needs.

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•  Service & Support 24/7 | 365 Days

•  Certified, Licensed & Insured Technicians

•  3rd Generation, Family-Owned Company

•  5-Star Customer Service

•  Careers with Growth & Support»

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Kettle Moraine Heating Buildings

Kettle Moraine Heating & Air Conditioning is a family-owned company that’s been around Southeastern Wisconsin for 35+ years — helping neighbors stay comfortable through freezing winters, humid summers, and everything in between.

We live here too, so whether it’s your heat, AC, plumbing, electrical, or air quality system giving you trouble, you’re not calling a stranger, you’re calling a neighbor who’s close by and ready to help.

Your repairs, installs, and maintenance are all backed by brands we trust including — Lennox, Mitsubishi, Carrier, Generac, Bradford White and others.

Local people. Local homes. Local comfort.

For all your home comfort needs, reach out to us today—we’re here to help!

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What Our Customers Say
Very professional, excellent work

Our original Lennox furnace was 49 years old, so we definitely wanted another one.
Furnace stopped working overnight. Called Kettle Moraine and had a technician at y place in less than an hour on a Saturday.
Problem was quickly diagnosed - all my options discussed and next thing you know we're heating the house again.
My furnace went out on Sunday morning. They got back to me in less than 1 hour and had someone out right away. Needed a new furnace and they had it all installed and ready before noon on the next day. Customer service is absolutely amazing!!!! Never went to them before and they treated me like family. Also offered several finance options. So easy to work with and again I can't say enough about the amazing customer service. Definitely recommend kettle moraine heating to anyone.
The guys were absolutely great!! They were informative, knowledgeable and did a great job!! I would highly recommend them and Kettle Moraine Heating & Cooling.
Our installers were great!! Knowledgeable and very professional,
Took more precautions to protect my floor than me.. the install is very professional in appearance and they took the time to explain everything in detail.. in all I would highly recommend Kettle Maraine to anybody!!!
Thanks!!
Dylan did a great job. Very professional, was kind enough to answer my questions as he was working on the furnace. A very nice person who was very knowledgeable and fixed the problem quickly. I appreciate the quick response and his great kindness and knowledge. Excellent experience. Thank you Dylan.
Jeremy was able to troubleshoot the problem immediately. He thoroughly explained the problem and had pictures of the issue to show me. He provided a solution to replace the parts or replace the furnace. I recommend Kettle Moraine to anyone else with a furnace!
This was an annual furnace maintenance visit, not a repair. Jim was very nice and efficient. I like the new security measure of receiving a photo in advance of his arrival. The cost includes A/C and water heater maintenance.
They notified me they were coming. They were polite, answered my questions, finished the job on time, and cleaned up after themselves. I didn’t even know they were in my house. I would recommend them to anyone looking for a new furnace.
Called yesterday because I was having issues with my furnace. Damyon came this morning and found the issue. He will be back to install a new thermostat and do a furnace tuneup. Absolutely wonderful young man to work with. Would recommend them to everyone! Thank you!
Always great doing business with Kettle. Luke is friendly, efficient, and knowledgeable.
On time. Courteous respectful and friendly technician and office staff.
On time, friendly, professional.
Diagnostic was quick. Getting a part for repair later this week.
Matthew was friendly and courteous technician. He did a meticulous job checking over the furnace.
Brian did an exceptional job servicing my furnace. He was very knowledgeable, professional, and super thorough. On top of it all, he was very friendly with a great manner. He caught an issue with the intake and exhaust for my furnace that was not correct from installation and he corrected it under warranty. I couldn't have been more impressed with the quality of service from Brian and Kettle Moraine Heating & Air Conditioning!
Great service!
Very helpful and reassuring
Very knowledgeable and thorough went through the furnace and checked everything good experience would highly recommend
Patrick promptly fixed the problem with our furnace after it conked out during a subzero night. (Fortunately, we had 3 electric space heaters.) It was a faulty low pressure valve. He thoroughly explained how the component worked and why it had failed. That was about a week ago, and we have no worries now.
I truly believe in this company! From the sales person Sam, to the whole team of installers and believe me their was enough of them. Starting with Matthew Regan. He and everyone who was on his team. Amazing. Thank you guys!!!
Tim was on time and explained our problems simply
Wonderful experience all around. Kettle Moraine Heating & Air Conditioning is welcome in our home any time! Love our new Lennox Furnace!
Leaking shower head. Jess was nice and extremely helpful. Additionally, he was incredibly knowledgeable regarding my exact shower handle/faucet and exactly what needed to be done.
Over the top service and friendliness
The service was amazing and immediate. My 16 year old furnace went out during these terrible freezing temperatures and it needed replacing..
I called Kettle Moraine Heating and they were able to get someone out within an hour to give me a quote.
Dan Glinske was professional and courteous and was able to get me a quote after completely examining our old system. Kettle Moraine Heating was able to replace same day and offered 24 month zero interest to pay for it! Great service ! I highly recommend them! Thank you to everyone there who made this a quick and stress-free experience!
Very professional,knowledgeable
Swimtastic Waukesha has been using Kettle Moraine for more than a couple of years now. We have had several plumbing, electrical and HVAC jobs completed. Our building is functioning better than ever. Kettle Moraine is an amazing company. The quality of work is excellent! We love our technician Mike! He is thorough and always does a great job. 10/10 highly recommend!
Lucas did a yearly PM on our tankless water heater and a check of well storage tank. He arrived within the promised window, was professional, courteous, and friendly. No problems with the work, would recommend KM and Lucas to anyone.
This company installed a Lennox furnace in my home last week through the Costco plan. The price was competitive and I have what I believe is a superior product. Installers did a wonderful job and cleaned up after themselves. I can't wait to see if I have savings on my gas bill.
KM Heating is great! They keep our furnace and AC in excellent shape. Their techs are always friendly and professional, answering all of my questions clearly.
Scheduling was easy. Brian knowledgeable, on time and fixed our problem in a timely manner.
Damyon Shelby did a great job. Part was broken and he got part and replaced it. Thank you Damyon!
Daymon did a great job diagnosing and getting furnace running optimally.
I’ve been working with Kettle Moraine Heating for over a year now and appreciate the quality of work and prompt service! Damyon was our technician and he was great to work with!
Technician Brian, came out and cleaned my furnace today he was there for about 50 minutes and did a great job he took pictures of the components after cleaning them then he shared them with us this is only our third cleaning on our new unit so hopefully it will last us for a long time, Thank you Brian, keep up the great work.
Great experience from sales thru installation.
Great communication, professional service
Khamya from Kettle Moraine Heating arrived on time to tuneup my furnace & humidifier. She did a great job in a short time, cleaned up after herself & was very friendly.
Dan and his crew did a nice and clean furnace installation .
Brian B. was professional, informative, and helpful.
1/29/2026 - Jess installed our dishwasher at our home and did a fantastic job. Highly recommend Kettle Moraine Heating and Air Conditioning.

12/11/2025 - Excellent. I was very impressed with Kettle Moraine Heating and AC. Luke arrived on time, was knowledgeable and personable and most importantly, fixed the issues with our boiler. Would highly recommend.
My furnace recently went out when it was negative temps outside. I worked with Kettle Moraine and they were exceptionally awesome to work with. They were quick to have my entire furnace replaced. The crew as well as upper management were amazing. I would highly recommend. Very professional and personable! Did amazing/quality work and even picked up after themselves! They also walk you through the entire process to ensure all your questions are answered! ⭐️⭐️⭐️⭐️⭐️

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