I just really appreciated what seems like an honest assessment. I was looking for a second opinion,…read morebecause two other companies had recommended major, costly repairs or replacement for my gas furnace. The Grenz folks came, carefully looked at the unit, and said, "If it were my furnace, I wouldn't do anything. It is running the way it's supposed to." This second opinion cost me something, naturally, but it also saved me between $5,500 and $19,500 (two quotes from the other two companies). Jim seems like a straight shooter. I'd recommend you give these folks a try.

He called me back and talked me through the fix. He did not wait to come out and wouldn't take any…read morepayment for his assistance. He clearly knew what he was doing. He was able to talk me through several troubleshooting exercises without seeing the gas fireplace itself. If I have any HVAC or fireplace needs in the future, I will definitely use Grenz

We called Pat's to diagnose and repair our boiler, which decided to crap out on us on a Sunday. The…read moretech, Michael quickly gave us a call back, and within an hour he arrived at our place. Michael not only diagnosed and repaired the boiler in record time, but he was also kind enough to take the time to thoroughly explain how a hydronic heater works, and all of the necessary maintenance involved. Michael was extremely knowledgeable with all things HVAC. We were charged a very fair price for the labor, especially considering the weekend callout. Fast forward a few weeks, and we called out Michael to update some of the heater controls. Again, Michael provided outstanding service and corrected a few other issues with our hydronic system. Still highly recommended!

Update 4-14-2026 To finalize this exchange and summarize…read morePat's treatment of my family and I. I have been extorted by Robert, accused of fluffing the bill, and essentially told that due to Pat's mistakes I am no longer welcome to use the service. This last part is verifiable in the response given to me. To whomever is above Robert I want to clarify how this situation was 100% caused by your company and now I am being painted to be the villain. If you pull the phone record you will hear that my family and I never once asked for a discount. In fact Robert was adamant he make it right and reactively (as this was after the first screw up) offered to take this job on the chin. I encourage you to ask Michael, as he is a super honest employee of the conversations we had with him as he made a mistake and misquoted. I assure you he will be nothing but truthful regardless if he made the blunder. With all this being said I am now not welcome to use your service according to the Google commentator. For that I am bummed as the workmanship, when Pat's does show up has been historically a class act. I have contacted the BBB, and Angie's list due to the extortion and treatment by Robert and Pat's heating as a whole. I do not care what the outcome is but to sit back and be bullied due to Pat's mistakes, and Robert's incompetence is absolutely ludacris. To the owner, if you want to make right terminate Robert's employment and I would be more then willing to continue business as my family has done so for the last 20 years. Robert has done nothing, and I mean nothing to make any of this experience pleasurable. Even eating the job, which your team did as Robert promised, came at the expense of extortion, and painting my family and I as the villain. I must say that the treatment of my wife and dying father (the one sitting home waiting for Pats delaying treatments to be available) lead me to get involved. The owner is welcome to call my dad and he will give you my number. I will not discuss anything with Robert as 99% of these issues came from his failed management. To any users reading this know I do this to show you the caliber of people Pat's employees. In the unfortunate event an issue does arise that is out of your control it is evident Robert will say whatever it takes to try fixing the solution but do minimal to help. A liar is a liar, beware before making any Deals with him and I will encourage anyone to get anything he says in writing to expedite the back and forth I had to do to get him to honor his commitment.

We had a new furnace installed in 2023 and a new air conditioner in 2024. We signed up for the…read moreannual "Maintenance Agreement". Well, we are 100% satisfied with the quality of workmanship, professionalism, prompt service, friendly attitude and excellent products sold. We have never needed a service call on either machines to date. The annual maintenance is such an outstanding offer. It gives you peace of mind that your investment is being taken care of. I would love to recognize Ray Seeber, our technician for his outstanding quality of work. He was so informative, patient and respectful. Thank you Ray, we look forward to seeing you again. Kettle Moraine, you are certainly the BEST!!!! Mr.& Mrs. O'Brien

So pleased with the service I received from Damyon Selby at Kettle Morraine heating. He completed a…read moretune up on my furnace, was very knowledgeable and personable. He provided me with a description and cost of maintenance that will be needed in the future and I didn't feel like he was trying to sell me things I didn't need. I will absolutely request Damyon for our future furnace needs and will recommend him and Kettle Morraine heating to others.

Very knowledgeable serviceman who answered all of our questions. Very professional yet with a…read morepersonal touch. Was truly interested in our specific concerns and questions. Did not take long to arrange an appointment. Offered suggestions on best way to set and regulate our furnace. After many years with another company that we've learned to distrust, a change was necessary and Donovan & Jorgensen definitely left us with a very good impression.

Just wanted a ballpark quote on my boiler that's working but acting up. To start they demand info…read morelike address and a phone number straight out the gate, I'm sure it's so they can harass me later with "do you still need" calls a week from now and when you give it you find out they charge $100 just for a diagnosis. Don't waist your time They clearly don't want the business.

Incredible service all around. The staff are so communicative and friendly - it's as if they are…read moreall owners of Droegkamp! Since helping us with a furnace issue during the great freeze of 2025, we have been using them since. Our family won't look to anyone else now.

We have used Dave Droegkamp for several years. In 2020 we purchased a new furnace from them and we…read morehave had it serviced by them since. We had a minor issue with it not starting this season and Dave B. and DeShay came to our home and promptly fixed the issue. They were professional, explained the issue, and cleaned up after they were done.

This business advertises "up front pricing", NOT TRUE. Had a service call to address a loss of…read moreheat. A slowly failing inducer motor was diagnosed. The tech, "made adjustments", got the furnace to ignite, and refused to tell me how. He then consulted with his boss and returned with a $496.00 bill. This is about 3x the amount of a common service call. He added that they would apply the $496.00 to the price of installing a new inducer motor, or a new furnace. Making the installation of a new inducer motor $904.00. I spoke with a supervisor who said it was more than a service call because "adjustments" were made, and the heat is now on. I consider this very sneaky and out of line. They never told me this service call would be $496.00, or any price for that matter. It was a sneaky rip off that the consumer should be aware of. I should have paid no more than $200.00 for that service call. Future customers should be aware of this tactic.

We had our air conditioner serviced by Jose and Donovan. They were respectful and prompt. The…read morecommunication was informative and they did a great job. We really appreciate the excellent service we get from Airserv.

I'm not big on writing reviews, but this service was exceptional…read more My heat went out last night during the Packer game. I called as soon as it was over thinking I'd have to leave a message for a call back in the morning. Nope. The owners wife was so friendly despite it being late on Sunday. They answered the phone, offered to come out that night, but opted for an appointment during regular hours. Are you ready for this? They got me in the next morning, diagnosed it right away, ran to get parts across town, and had them installed so fast it was spooky. I'm hesitant to trust heating and cooling companies, but was seriously impressed. They'll be coming back for a clean and check on my furnace and A/C unit this spring. Great job, Russ. Yep, the owner of the company is still in the field

Turned on the air yesterday so John could come home to a cool home after a day of construction…read morework. No cool air. John got home, called Russ as he had previously used him for AprilAire. Before 10 am today cold air is blowing! VERY nice, professional, reasonably priced, transparent in their work, open for any communication or questions during and after. I feel TOTALLY CONFIDENT giving this company 5 WELL-DESERVED stars!

Tom misquoted work I hired him to do. He gave me a quote, showed up for the job, realized he didnt…read morepay enough attention (he overlooked my basement ceiling being drywalled ) He started the job but decided after cutting three vents holes in my floors that he didn't want to finish the job he misquoted. Than he sent Elizabeth his admin person to do his lying for him. They now demand i remove the entire ceiling and verify there is no mold or asbestos before they will return. We discussed the condition of the basement, specifically that there is soke mold and likely asbestos wrapped pipes. The morning he arrived to do the job he immediatelyadmitted he screwed up. He assured me he would do the work anyways as it was his mistake. Now he won't respond to messages sent directly to him, and Elisabeth is like dealing with a child who will not admit they are wrong. Despite the very good reviews, it has been a nightmare trying to get this company to follow through with what they said they would do. I strongly recommend you look elsewhere for your work.

Tom Yodor maintains the HVAC equipment in my home. He does a terrific job, and is very…read moreinformative so that I can plan work in the future. This past Monday he installed a new Honeywell T10 Lyric thermostat. He tied this in to my existing bypass humidifier to automatically control it to minimize window sweating in the summer. The new controls required a new wire to tie the thermostat to the humidifier. Tom efficiently ran the wire from the main floor to the basement. The T10 can also control via remote sensors to assure adequate heating and cooling. I am very happy with the thermostat, and how the system operates!

We thought we needed vents cleaned. Usually, this can cost hundreds of dollars depending on who you…read moreuse and size of the job. I don't know what someone else would do, but Abner the owner came over the day after I contacted Yelp for contractors. He came out and told us after looking at our furnace that it was clean and we don't need his services! I was amazed. He then advised us by telling us he would do this and his staff as well to be honest and forthright. This is what a business should be doing. Help people, do right by people and if you do the work, which he informed us, would be done or redone until correct. I don't know what the cost would be if he had to do the work for us, but I was impressed with his words, actions and information. He returned after advising us that the furnace should be sprayed with a deterrent to prevent mold and came back to do the job for us the next day. Wonderful. 5 star quality business practice.

From the owner: Call for a free estimate today.read more

We had a leaking front loader washer and called them. They immediately ordered a new door seal…read more While waiting for the seal to come in, the repair technician contacted us with some suggestions to alleviate the problem. We texted him photos and videos. He was super professional and very helpful contacting us via text over a number of days. We ended up solving the problem without the repair. Lake Country did not require us to take the part. I also offered to pay a trip charge since they were so helpful. They said it wasn't necessary. Lake Country is the antithesis of every bad joke and negative comment about appliance repair companies. They are kind, prompt, concerned about the cost to the consumer and consummately professional. Totally first class.

Really appreciated the quick service! Lake Country Repair was able to come and fix our oven the…read moresame day and was able to have it fixed within 45 minutes. I highly recommend Lake Country Repair.