Business Details
19 Years
experience
Your Trusted HVAC Partner in Kiel, WI
Since 2007, Advanced Custom Geothermal has been dedicated to providing comprehensive HVAC solutions for residential and commercial clients across Wisconsin. Our expertise spans traditional heating and cooling systems as well as cutting-edge geothermal technology, positioning us as a leader in energy-efficient climate control. As the #1 WaterFurnace Geothermal contractor in the state, we combine decades of hands-on experience with innovative design to deliver tailored solutions for every property. Our team of certified professionals specializes in system installation, repair, and optimization, ensuring optimal performance and customer satisfaction. We hold the prestigious Geo Pro Master Dealer status, a distinction earned by fewer than 5% of WaterFurnace dealers nationwide.Through free energy analysis services, we help clients understand potential savings while maintaining transparency about upfront investments. Our commitment to quality is reflected in numerous five-star reviews highlighting exceptional workmanship and long-term cost benefits. From initial consultation to post-installation support, we prioritize personalized service that addresses unique property requirements. Our commercial division extends these capabilities to businesses seeking sustainable climate control solutions. With a showroom located in Kiel, Wisconsin, we serve over 30 communities across the state, combining local expertise with national industry standards.
Services
Geothermal Heating
Air Conditioning
Furnace Installation
Commercial HVAC
Energy Analysis
Duct Cleaning
Refrigeration Services
Geothermal Cooling
In-Floor Heating
HVAC Repair
Details
- Year established: 2007
Highlights and features
- We offer over 15 years of Wisconsin-specific HVAC experience
- Our team holds the prestigious Geo Pro Master Dealer certification
- We provide free energy analysis for personalized savings projections
- Our WaterFurnace systems qualify for state and federal tax incentives
- We serve over 30 Wisconsin communities with local expertise
Associations and certifications
- WaterFurnace
- Geo Pro Master Dealer
What people say
Fantastic savings
Excellent employees
Great work
Beautifully works
Highly recommend
Services
Geothermal Heating
Our geothermal heating systems utilize underground temperature stability to provide efficient climate control. By transferring heat between your property and the earth, these systems reduce energy consumption by up to 70% compared to traditional HVAC. Wisconsin residents benefit from significant cost savings and qualify for multiple tax incentives through this environmentally friendly technology.
Air Conditioning
We offer complete air conditioning installation and maintenance services for residential and commercial properties. Our energy-efficient units integrate with existing HVAC systems to ensure optimal summer comfort. From standard installations to advanced UV air purification upgrades, our solutions address both temperature control and indoor air quality requirements for Wisconsin's climate.
Commercial HVAC
Our commercial division provides tailored heating and cooling solutions for businesses across Wisconsin. Services include system design, installation of energy-efficient equipment, and maintenance programs for traditional HVAC and geothermal systems. We specialize in light refrigeration, architectural sheet metal fabrication, and large-scale climate control solutions for various commercial applications.
Energy Analysis
We offer complimentary energy analysis services to help Wisconsin property owners understand potential savings from geothermal conversion. Our assessment evaluates current energy consumption patterns, property characteristics, and available incentives to create personalized savings projections. This service helps clients make informed decisions about HVAC investments with clear financial expectations.
HVAC Repair
Our repair services cover all HVAC system types including traditional furnaces, geothermal units, and commercial refrigeration equipment. With experienced technicians and prompt response times, we minimize system downtime while ensuring optimal performance. Regular maintenance programs help extend equipment lifespan and maintain energy efficiency across residential and commercial properties.
People
Sean Steffes
Owner
As founder and owner, Sean Steffes leads our team with over 15 years of HVAC industry experience. His expertise in geothermal system design and Wisconsin climate challenges ensures practical, energy-efficient solutions for every client. Sean maintains active involvement in all major projects.
Questions
What makes geothermal heating different from traditional systems?
Geothermal systems use the earth's stable underground temperature for heating and cooling, achieving 50-70% greater efficiency than conventional HVAC systems while reducing environmental impact.
How much can I save with a geothermal system in Wisconsin?
Most Wisconsin homeowners save $1,500-$3,000 annually on energy costs while qualifying for state and federal tax credits covering up to 30% of installation costs.
Do you service both residential and commercial properties?
Yes, we provide complete HVAC solutions for homes and businesses including specialized commercial refrigeration and large-scale climate control systems.
What areas of Wisconsin do you serve?
We serve Kiel, Appleton, Sheboygan, Fond du Lac, Manitowoc, Cedar Grove, West Bend, and over 30 other Wisconsin communities with local expertise.
Are financing options available for geothermal installation?
While we don't offer direct financing, we help clients maximize available tax incentives and utility rebates to offset upfront costs through energy savings projections.
What HVAC services do you offer besides installation?
We provide comprehensive repair, maintenance, and system optimization services including duct cleaning, air quality improvements, and refrigeration equipment servicing.
Reviews (4)
Alex Beaty
Nov 07, 2021
Report
Advanced Custom Geothermal has done good work on my Waterfurnace and provided great advice about specific issues. Very responsive and reasonable.
Travis Konz
May 19, 2019
Report
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!
Pierre Jacque
Dec 21, 2018
Report
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
Report
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!
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!
