The Thielmann Group

Offering Reliable Heating & Cooling in Wisconsin for For Over 90 Years

Thielmann & Son is proud to be your heating and cooling experts in Southeast Wisconsin since 1929! With locations in Hartford, Menomonee Falls, New Berlin, Oak Creek, Waterford and Burlington we provide exceptional service to residential and commercial customers across all of southeast, WI. When you turn to Thielmann & Son for your furnace repair, air conditioning repair, or the installation of new equipment, you will have the peace of mind knowing that we have spent over 90 years making homes comfortable. Thielmann & Son provides all your heating and cooling needs, as well as air quality systems, sheet metal services, and repair of all makes and models of heating and cooling units. Generations of loyal customers turn to Thielmann & Son for quality products and expertly performed installations. Let the experienced professionals at Thielmann & Son 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 Angie’s List, Yelp, Google, Lennox and more.