About Us | Learn About The Thielmann Group
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Heating and cooling emergencies happen when you least expect them. Contact the professionals at The Thielmann Group to assess and fix the situation you're dealing with. We have the necessary skills and tools to fix your system so you can safely use it once again. Call the Thielmann team at (262) 299-6197 to get emergency HVAC services in Southeast Wisconsin.
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About Us

Learn About The Thielmann Group

The Thielmann Group knows no bounds. We have proudly been your heating and cooling experts in Southeast Wisconsin since 1929! We offer exceptional service to residential and commercial customers across southeast WI. When you turn to us for your furnace repair, air conditioning repair, or the installation of new equipment, you will have peace of mind knowing that we have spent nearly a century making Wisconsin homes comfortable. The Thielmann Group provides all your heating and cooling needs, air quality systems, sheet metal services, and repair of all makes and models of heating and cooling units. Generations of loyal customers turn to us for quality products and expertly performed installations. Let the experienced professionals at the Thielmann Group put their years of expertise to work for you. We have an A+ rating with the Better Business Bureau, thousands of satisfied customers, and outstanding reviews on websites such as Angi, Yelp, Google, Lennox, and more.

The Thielmann Group cares about the communities that we serve. We are members of the Chamber of Commerce in many of our communities. We support charities such as Girl Scouts, Disabled American Veterans, Special Olympics of Wisconsin, Multiple Sclerosis Society, and the American Cancer Society. Our team proudly participated in the Extreme Makeover Home Edition home build in Dundee, Wisconsin. In addition, we also help local charities such as Lions Clubs, Knights of Columbus, and many local youth sports teams and Police and Fire Department special programs.

The Thielmann Group also gives back in another significant way. We have participated in the Feel the Love campaign since its inception. Feel the Love is a program developed by Lennox Dealers in Wisconsin and Upper Michigan. Every year Lennox Industries and participating dealers donate and install a new Lennox furnace for families in need throughout Wisconsin and Upper Michigan. We donate all the additional materials needed to install the new furnace, and our employees donate their time. Through this program, we have been able to help families that could not otherwise afford to replace their heating equipment. Some of these families had already been without heat for two years. To read more about this program or nominate a deserving family, please visit www.feelthelove.com.

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Services We Offer

  • Heating
  • Cooling
  • Indoor Air Quality