We’ve had several of their employees to our home to fix various things and are always so impressed. Most recently we had Andy at our home for a plumbing concern. He went above and beyond. I can’t recommend Thielmann enough!! So kind and take care of you as soon as they’re able, it’s pretty much always been next day for us!
About Thielmann Heating, Cooling & Plumbing
The Thielmann Group has been a trusted heating and cooling expert serving Southeast Wisconsin since 1929. With locations in New Berlin, Hartford, Burlington, and Menomonee Falls, they provide excellent service to both residential and commercial customers. Customers appreciate their staff for being kind, knowledgeable, and professional. When urgent repairs are needed, like furnace or air conditioner issues, they respond quickly and efficiently. The technicians, such as Brian P. and Nicholas H., are experienced—Nicholas has 24 years in the industry—and take the time to explain problems clearly. The company values respecting customers' homes, often wearing disposable booties, and offers personal recommendations tailored to each situation. They are known for fast service, sometimes installing new systems within a day of the quote. Customers often mention how helpful and caring the employees are, and how they feel confident in the advice given. The Thielmann Group is highly recommended for all HVAC needs in the region.
Reviews
Thank you to everyone at Thielmann & Son for the fast and friendly service we received servicing our furnace! These days it's hard to find someone you can trust! I would recommend Thielmann & Son to everyone! Thanks again
Nicholas did a great job with our furnace tuneup today. He arrived toward the beginning of the time window scheduled, and called me when he was on his way. He was friendly and efficient, cleaned up after his work was completed, explained what he found and what he suggested I do going forward. He answered all my questions, and finished the work in a timely manner.
Photos

Hours
Good to know
- on-site services
- accepts credit cards
Location
105 West Commerce Boulevard, Slinger, WI 53086
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