Matthew did an awesome job on my furnace tuneup. We explained everything very thoroughly and suggested a few things to me.

Decent job, very professional and explained well

Very good service nice guy hard working.

Great job on my generator maintenance

Always honest, prompt, excellent service.

Showed up on time and performed professional work with excellent customer service.

Khamya was awesome! She is very friendly and checked everything with our furnace to make sure it is it perfect working condition.

Outstanding service from Kettle Morraine Heating and Plumbing once again. Knowledge and courteous plumber who is not afraid of cobwebs. 😁 Jess was great and explained each step of the repair and made sure the gas equipment and appliances were safely reconnected to the gas and power.

Excellent work, very knowledgeable and let me know what was going on through the whole process..Very professional...

Patrick did an amazing job. He was kind, respectful and gave great customer service. He also educated me on what he did and what needed to happen. He was very informative.

The team was very responsive when we were surprised with a leaking water heater. They were professional and did a wonderful job for us.

We are thrilled with our Generac whole home generator installed yesterday. We suffered major basement damage from the August floods last year and then lost power for 50 hours earlier this month. Knowing that when the power goes out again we will be able to cook, heat or cool the house, run all of the appliances, and most importantly power the sump pump is so reassuring.
Cole started the process with our estimate last week, and yesterday Ian, Lucas, and Eric got everything in place including upgrading the size of our indoor gas line. We highly recommend Kettle Moraine Heating and AC.

Jacob did a fine and very thorough job installing a humidifier and new thermostat. Would definitely request him for future work.

Experienced professional with excellent knowledge of radon mitigation products, system, and installation. He was able to answer all my questions about radon monitoring and mitigation.

We reviewed radon levels at about 4 locations in the basement and discussed potential location for the second suction point & mitigation system.

He was very pleasant to work with and volunteered to contact the subcontractors to get more detailed information about the existing plumbing, radon mitigation, sump, & HVAC.

We will be contacting him again in JULY 2026 to install a second suction point with its own fan. He also assisted us in 2023 and 2024 with the radon mitigation system in our previous home. We very strongly recommend him without any reservations.

Peter and Niah installed our new Lennox Elite furnace. On time, cleaned up and took about 5 hours. Nice job.

Brent called less than an hour after I called the company to tell me he was on his way. He gave me three quotes and explained each one thoroughly. He also explained what to expect the next morning when they came out to install my new furnace. I highly recommend this company.

We are retired yet have extensive experience in the installation & service of commercial heating & A/C. We got 3 quotes on identical units to replace furnace and A/C; tossed one & then decided on Kettle Moraine. Their quote was lowest due to their partnership with Costco. We liked their sales rep, their thorough “no surprises” presentation, answers & quote. Their office contacted us promptly to set an install date, followed up two or three times and the crew was on time. They worked hard, consistently & efficiently as a team, showed true care for our house, and installed the units and piping to our expected high standards. They answered all questions, explained the equipment and remained polite as we circled around them on occasion watching. The jobsite was fully cleaned after. The furnace has operated as designed since. They will return to test the A/C when it is hot enough to do so. We fully recommend this company and plan to have them back for service.

Very helpful, courteous, answered my questions and was respectful of my home. Highly recommended

Jacob did an amazing job…very thorough and professional!

Kettle Morain provides consistent good quality services. The technicians are good and excellent in what they do. My last service for tune up was with Matthew and he is really a great technician. You can rely on them!

Brian was early. Called before and arrived the time he was supposed to arrive. He was knowledgeable and nice and fixed my problem.
He did an amazing job. Thank you

Dylan is great to work with, very thorough and explained things very well. I love Kettle Moraine Heating & Cooling.

I cannot recommend them enough! They were fast, efficient, and everyone that helped us was so kind. They were able to relieve a very stressful situation and resolve the issue very quickly. 10/10!

Jess did a great job installing a new utility sink with new water lines and a drain in my basement. He was enthusiastic, professional, and communicative. I wouldn’t hesitate to request him again.

Luke was incredible. Very responsive and educated. Explained everything in simple terms and laid out options for what was needed to be done.

Jeremy and kettle moraine heating do an excellent job! I would highly recommend.

Very professional. Goes above and beyond. Came out very quickly after called. Repaired furnace exhaust pipe damaged from storm.

Was very satisfied with Elian's service. He knew exactly what to do and got the job done. Will be calling Kettle Moraine heating for my air conditioning check up.

Paul came to our house to perform annual maintenance and repaired a fan issue that had apparently been wrong in our HVAC system since install (by another company). Our home was noticably warmer within minutes. He was punctual and very knowledgeable about all of the questions I asked. Would recommend Kettle Moraine to any homeowner. Thank you!

Damyon was great! Diagnosed the problem.
Since it was an oil pump had to have someone come out on sunday to fix it.
Your people couldn’t get there until Monday

Shawn was great and explained his service work and overview very well

The customer service reps and installers were very nice and knowledgeable.

Paul was very thorough and answered all of my questions.

Tune up was fast and efficient!very knowledgeable!

I recently replaced my 17-year-old furnace and chose Kettle Moraine Heating & Air Conditioning, LLC to install a new Lennox system. My previous Lennox furnace served me well and was still running, but after a recent maintenance visit, I was advised it was nearing the end of its lifespan. Rather than push it further, I decided it was the right time to replace it and check it off my to-do list.

In addition to the new furnace, I upgraded my air filtration system and added an Aprilaire humidifier. They also included a complimentary upgraded thermostat that I can control from an app on my phone—something I wasn’t specifically looking for, but it’s been a great and convenient addition.

While the system is brand new and performing as expected, what truly stood out was the level of service and professionalism.

My technicians, Jordan and Enrique, were outstanding—polite, respectful, and incredibly hardworking. I received quotes from a few other companies, all of whom were professional and competitive. However, Kettle Moraine set themselves apart by offering additional savings through a Costco member discount and rebate.

Overall, this was a seamless and positive experience from start to finish. The combination of quality products, fair pricing, and exceptional service made this an easy decision. I would highly recommend Kettle Moraine Heating & Air Conditioning, LLC to anyone looking for honest guidance and top-tier installation work.

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!