You can count on Advanced Custom Geothermal for all your heating, cooling, and geothermal needs. Whether you are building a new home, updating your existing heating and cooling system, or require repair service Advanced Custom Geothermal is your solution for a full-service heating, cooling, and geothermal contractor. We are the #1 Water Furnace Geothermal contractor in the state of Wisconsin. Geothermal Heating & Cooling systems offer significant financial savings drastically lowering monthly heating and cooling costs, along with multiple tax incentives.
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Since 2007, Advanced Custom Geothermal has been providing traditional and geothermal HVAC services to the residents of Wisconsin. Owner, Sean Steffes, helped found the company and continues to lead their team of HVAC professionals. Although geothermal is the primary focus, ACG is a full-service HVAC contractor that also installs and services gas and oil furnaces, gas fireplaces, air conditioning, and air exchangers. Call us for all your HVAC needs. Advanced Custom Geothermal has been wonderful to work with.
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Advanced Custom Geothermal (ACG), is a full-service HVAC contractor. We specialize in the installation and repair of traditional HVAC systems as well as energy-saving WaterFurnace Geothermal Systems. Summer in Wisconsin can get hot and it is important to have a central air unit that is working properly and efficiently.
Reviews (5)
Alex Beaty
Nov 07, 2021
Jarrod Zimmermann
Jun 17, 2020
Travis Konz
May 19, 2019
We recently moved into a new house, and our AC unit wasn't working properly. At our previous address we had Dan come out from Advanced Custom Geothermal to install an ac unit for us and we were very pleased. Fast forward to today, and Dan came back out to look at our ac unit. Not only did we receive once again, five star work, but Dan was so honest and personable!
He remembered where I worked and everything, and it was over a year in a half since he last made a house call for us to troubleshoot and tell us our options. Turns out our ac unit had a bad wire, and Dan replaced it right away and got our ac up and working in a matter of a half hour! Very impressed with his friendliness and service! I will definitely recommend ACG to our friends and family!
He remembered where I worked and everything, and it was over a year in a half since he last made a house call for us to troubleshoot and tell us our options. Turns out our ac unit had a bad wire, and Dan replaced it right away and got our ac up and working in a matter of a half hour! Very impressed with his friendliness and service! I will definitely recommend ACG to our friends and family!
Pierre Jacque
Dec 21, 2018
I would be careful doing business with this company. I recently received machinary from Sean Steffens, one of the partners, that was presented as being in "good working order". Upon closer inspection, the machine does not operate properly, or at all. When I contacted him regarding the issue, he apologized but did not offer any remedy. Honesty and integrity are not priorities for the ownership of this business.
Deanna B.
Mar 11, 2018
Dan and his crew have been wonderful to work with. This was the first geothermal unit we've installed, and were initially cautious about the price. However, Dan spent a lot of time adapting the entire system to fit our land and our needs, and detailing exactly how the system will save us money. The system works beautifully, and we're very happy with it.
They've been very fast and friendly with response to any questions we've had since installation. We also had an issue where someone flooded our laundry room, and they were out the next day to work on the clean-up where water had run down the cold air returns. Each of the guys we've worked with have been friendly, efficient, and happy to answer any questions we've had. Good job, guys!
They've been very fast and friendly with response to any questions we've had since installation. We also had an issue where someone flooded our laundry room, and they were out the next day to work on the clean-up where water had run down the cold air returns. Each of the guys we've worked with have been friendly, efficient, and happy to answer any questions we've had. Good job, guys!
