- Trusted Since 1929 -

Heating and Cooling all of
Southeastern Wisconsin

Experience the Difference

Thielmann & Son Heating has been providing the best climate comfort products along with money saving solutions and superior customer service to Southeast Wisconsin since 1929. Our team prides ourselves on timely service, competitive pricing, attention to detail, and our willingness to always go the extra mile for our customers!

Residential and Commercial Services

Our Furnace, Boiler, and Air Conditioner Installation and Repair Services are a Step Above.

We hire smart people who work hard and are fun to be around. Everyone from our certified heating and cooling technicians, indoor air quality specialists, refrigeration certified experts, and knowledgeable office professionals does whatever it takes to keep our customers comfortable. When you work with our skilled crew, you can rest assured that your home comfort will be taken care of. We service residential and commercial systems, including:

We provide routine maintenance and reliable furnace-repair service for all furnace makes and models.

We recommend and install all air conditioners, and are happy to do maintenance and repair for all AC makes and models.

Not all contractors service these hydronic systems, but we’re proud to lend our expertise for your boiler service needs, including installation, maintenance, and repair.

Make sure your home’s air is healthy with indoor air quality service from our pros. We can recommend humidifiers, dehumidifiers, air purifiers, and more.

Financing Available

We utilize a variety of financing partners to help you meet your specific needs. We have many terms available to comfortably fit your budget.

Maintenance Plans

Sign up for a maintenance plan to protect your system from breakdowns, improve efficiency, and extend its lifespan.

Current Promotions

Save big while staying comfortable. We change our promotions and offers regularly to help our customers save.

"From start to finish our experience with Thielmann & Son was fantastic!"
Jen T