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New Berlin






Menomonee Falls


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New Berlin




Menomonee Falls




Please take a moment to find out why Thielmann & Son is the top choice for furnace & air conditioner (HVAC) repair and heating installation service in Milwaukee, Menomonee Falls, New Berlin, Hartford, and Burlington.


Very Courteous

Thielmann & Sons installed a new furnace. The person who came to appraise my old furnace was very professional. The two men who installed the new furnace were very courteous and focused on the removal of the old furnace as well as installation of the new furnace. The building inspector was very pleased with their work. I was too as they cleaned up and left everything in good order. I would highly recommend them.
Audrey Neu


This was without question the greatest group of men working together to make my house comfortable. They put in a heating and air conditioning system. They worked so hard from the minute they got there until the job was completed. They were personable, professional and very patient. I am not a mechanical kind of person, and each of them took the time to answer questions I had throughout the day. They knew exactly what they were doing and made sure everything was done down to last minute detail. I could not recommend this team any higher or thank them any louder for what they did. Nancy and Brandy in the office were so easy to work with and made this set up so easy and painless. Brad and Tom kept things flowing from start to finish beginning with the estimate and finishing with the install. Ryan, Jorge, Darryl and Tyler were simply the best bunch of guys you would ever invite into your home. I can't tell you this is how every HVAC operation works, but this is a model to be emulated. A simple thank you is not enough, but it is all I have to offer. So Thank you one and guys rock.
J. Scott Gibson

Extremely Pleased

Thank you so much for the wonderful service. We are extremely pleased with our new furnace. Your installers were very thorough with explaining everything. I will highly recommend your company to anyone in need of service or a new furnace. Thank you again...
Jim & Pam Schneider

Great Experience, Excellent Service

This dealer (John Thielmann & Son) was absolutely fantastic to work with. Consultation, office staff (Nancy), installation team - were so easy to work with. The best contractor I have ever had do work in or on my house!!!! They are responsive, helpful and trustworthy.
J Wascoe

Excellent in Every Respect

My experience with Thielmann was excellent in every respect. I think that they went above-and-beyond to do a good job, and I look forward to continuing on with them as our heating and cooling service provider. I would be happy to serve as a reference if you have customers who desire to speak with an existing client.  


Robert & Ellen Venable

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