Furnace annual service. Very thorough.

Brett Zielski from Kettle Moraine Heating was at our home to service our air conditioners. He was so patient with me and his warm personality and knowledge got the job done while explaining the process to me. I feel confident everything was done with perfection, and I would recommend Brett and Kettle Moraine Heating to my friends and neighbors.
Dale/Leila Collins

Very professional and reliable. On time as scheduled. Have used for over 15 years.

Kettle Moraine Electric solved a long standing problem that another electrician could not solve. So very pleased.

Jacob did a great job of diagnosing and explaining our furnace issue and providing multiple options.

Ray was extremely professional, friendly and very sociable. We were very happy with his service!!

Aaron took his time and did an excellent job of explaining what he was doing and what we can look forward to with our a/c unit. Excellent service!

Today, we replaced our water heater with a tankless model. Bill did an outstanding job - extremely professional and knowledgeable. Kettle Moraine continues to provide excellent service. We are so glad to have developed a relationship with them. And Bill is the best. Five stars!

Guys we’re great fast and efficient

I called this morning because I was getting an error and to my surprise they were able to come out and it was fixed in no time. Great service, kind, understanding, and would absolutely recommend Kettle Moraine Heating and Air Conditioning.

Great to work with . Brian was very professional and explained everything.

I had a 31 year old system, so I thought they would just try and sell me on a new one from the start. But the tech was thorough and did what he could for the old one before convincing me to get a replacement. All crew involved were great and friendly!!!

Very dependable and professional service. This is the only company I use and recommend to all of my neighbors.

On time. Friendly. Staying with an issue til it was solved.

My technician, Jim, was very professional. I had a broken WiFi thermostat. He called me ahead of my appointment time with a suggestion to try resetting it. While it still needed to be replaced, I appreciated the suggestion! Jim installed the new thermostat, explained the features and downloading the app. He saw I had a furnace maintenance appointment scheduled in 2 weeks and said he could take care of maintenance the same day so I wouldn't need an extra appointment. Jim was very very professional, personable, and his workmanship was excellent!

Jacob was on time, friendly, professional, knowledgeable, thorough, informative, open and honest. He reviewed his service process, findings, suggestions and recommendations. I will request him for future service opportunities and recommend Kettle Moraine to anyone in need of HVAC services.

Very friendly young men installed our furnace and heat pump today. Good crew, works well together. Very professional.

This was Matt’s second visit to my home. He arrived as scheduled, and I appreciated his call saying he was on his way. Matt explained what he would be doing, what he did, took photos as proof and did an excellent job. Thank you Kettle Morraine.

Dylan did a wonderful job doing my preventative maintenance on my furnace to get ready for a season . He was very polite and explained everything I needed to know.

Ray was amazingly thorough cleaning our gas furnace and replacing the filters. He is very personable. I would request him again.

Today 10/14/25 was the first time Kettle Moraine was ever at my home. David T from the plumbing division professionally diagnosed my issue. I appreciated that he showed me the size of the worn flush valve compared to the new one he would be installing. He explained the valve’s function to insure I understood that this was causing the periodic ghost flushes I was hearing. I loved that he took the time to explain the function and assure me this little rubber item being replaced would alleviate my issue.

Then he went to my kitchen and replaced a Kohler duo strainer where the bronze skim peel had came off. Kohler had given me a replacement duo strainer since the strainer was damaged within in a week of a prior install. David suggested to help insure the bronze finish not peeling off as quickly this time I should turn on the cold water first not dump hot boiling water into the colander and then turning on the cold water to rinse the pasta off like I did when I saw the peel missing after making pasta. Again, I love these helpful tips!!

It was a fabulous first experience he went above and beyond to fix the items on my repair list!!

Even better, I’m excited and looking forward to having my first furnace tuned up on 12/8 with Kettle Moraine!!

I signed up for the annual furnace and AC tuneup plan. Thank you again to Matt in the main office for making my first experience on the initial phone call incredible !! He explained the different levels of plans and I was able to choose the one I thought best fit my needs. 🙌🏻

Since then I’ve spoke to multiple people in the office and everyone has upbeat and friendly.

Great job running through the system and explaining the issues.

Patrick did a good job and as always was very friendly and professional. Very happy with my service.

Patrick did a great job on our furnace maintenance and was very detail oriented!

Jim was on time! Very professional, answered all my questions, and completed the work in a timely manor. Thank your for your great service.

Bill completed the installation in a timely and efficient manner and explained everything when the job was completed.

Luke was great! Very professional and answered all my questions. Explained everything very well.

Representative was very friendly and very good at his job.

Ian was an outstanding technician. He explained in the beginning the various parts he was servicing. At the end he helped me setup the app for the generator. He had the information to make it an easy job. I will ask for Ian next year when it is time for the yearly service appointment

Matthew,
Thank you🙏

Great service. Very thorough. Very polite.

Paul did a wonderful job today. He inspected everything, explained to me what he was doing, and then also explained everything that I can do in between inspections to make sure our equipment is running smoothly. My husband and I have been very happy with Kettle Moraine over the years.

Prompt response to service inquiry.
Technician, Luke, was knowledgeable, polite and communicated progress in a way that was easy to understand. KMH&C is my new “go to” for all things HVAC!

Matt is an extremely knowlegeable and experienced furnace technician who was very forthcoming with answering my questions about the condition of my furnace. He was verycourteous, cordial, clean cut, and very professional. Also, Matt maintenance inspection was very thorough. He went through the furnace from soup to nuts. I am very satisfied with the service Matt performed, and with Kettle Moraine Heating and Air Conditioning.

Professional and courteous. Came to our home ready to treat it like his own.

Always honest, prompt, excellent service.

Kevin from Kettle Moraine Heating really knows his stuff. You can tell he’s been in this business a long time — he’s professional, pays attention to the details, and doesn’t give you any bull crap. Straight to the point, honest, and gets the job done right. The install went smooth, everything looks clean, and I couldn’t be happier with the work. Definitely recommend Kevin and Kettle Moraine Heating.

Very professional service and trustworthy work.

We had the controller board go out on our furnace 2 years ago and had it relpaced. Our furnace went out again over the weekend so we called Kettle Moraine Heating & Cooling this time. Brandon found the controller board was burnt out AGAIN and an additional part now also. The cause of the problem was water leaking within the unit from the air conditioner, which should have been found and corrected by the previous company who replaced the controller board 2 years ago!!
We will be using Kettle Moraine Heating & Cooling from NOW ON! Thank you Brandon!!

Very comprehensive and professional from inspection to estimate through installation. Being an HVAC partner with Costco helped on the pricing too.

Greg was great, highly recommend!

Came right on time and explained things well to me. Paul was friendly and told me about other available services, which i will definitely use. I highly recommend this company.

Excellent work done by Kettle Moraine and their talented crew! I had both a boiler and A/C put in recently and just in time for the winter ahead! Pristine job and done in half the time estimated! Highly recommend!!!!