- Trusted Since 1929 - Heating and cooling all of Southeastern Wisconsin Find out how to win! 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! VIRTUAL QUOTES & REPAIRS CALL TODAY Contact Us This form is monitored during regular business hours. If you need emergency service, please call us. Name * Phone * Email * City * Comments Captcha * 4 + 2 = Contact Us 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: Furnaces Air Conditioners Boilers Indoor air quality 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.. Read More Maintenance Plans Sign up for a maintenance plan to protect your system from breakdowns, improve efficiency, and extend its lifespan. Sign Up Current Promotions Save big while staying comfortable. We change our promotions and offers regularly to help our customers save. Current Promotions " From start to finish our experience with Thielmann & Son was fantastic! " Jen T GOOGLE 5 STAR REVIEW Read more 5 Star Reviews We got you covered. Our Locations The Thielmann Group knows no bounds. We service all of your Southeastern Wisconsin residential and commercial needs. CONTACT US HARTFORD (262) 673 - 2500 MENOMONEE FALLS (262) 293 -9285 NEW BERLIN (262) 786 - 2000 OAK CREEK (414) 764 - 4700 WATERFORD (262) 534 - 5568 BURLINGTON (262) 763 - 2653 SERVICES RESIDENTIAL COMMERCIAL DUCT CLEANING REPLACEMENT REPAIRS THIELMANN GROUP THIELMANN & SON ROTH HEATING BURLINGTON The Thielmann Group © All rights reserved