Our Reviews
See What Your Neighbors Are Saying
They performed an April Air install for us. Very professional, fast, knowledgable and responsive. Best price compared to the other places I called. They thought there may be difficulties installing due to our furnace set up, but were still willing to come out and try and offered to make us a custom box if needed for no extra charge. Highly recommend. Thank you!
Jenni S.
The Thielmann group team was professional, knowledgeable, and on time. They did a fantastic job at a reasonable price. From our first encounter, we could understand how experienced the group was. There were no issues, and the new furnace worked perfectly. I highly recommend them.
Vincent R.
Thielmann Group installed a new furnace and heat pump for us. We have been using them for HVAC maintenance for several years and were always happy with their service. We got quotes for the new system from a few companies and we were pleased that they didn't just come in with a competitive quote, but the best price. We're happy with our new system.
Laurie K.
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Why Choose the Thielmann Group?
Offering Reliable Heating & Cooling in WI for Over 90 Years
- Same-day services
- Licensed & insured
- NATE-certified & background-checked technicians
- Free estimates on replacement quotes
- Maintenance plans available
- Upfront pricing & financing options
- Military, veteran & senior discounts
- A+ rating from the Better Business Bureau
- Lennox Feel the Love partner