Yourneighbor
What To Expect
Discover the Thielmann Group Difference
Fully Licensed & Insured
Our experts have the expertise and training to deliver the highest quality services every time.
Trusted Since 1929
We have served Southeastern Wisconsin for nearly a century, so we understand the needs of our community.
Financing Available
We offer various options from financing partners to help you meet your specific needs and budget.
5-Star Customer Service
The Thielmann Group promises five-star customer service with every interaction.
Committed to Excellence
We complete jobs quickly without compromising our commitment to excellence.
Satisfaction Guarantee
Our team is dedicated to ensuring your 100% satisfaction with every service we perform.
Fully Licensed & Insured
Our experts have the expertise and training to deliver the highest quality services every time.
Trusted Since 1929
We have served Southeastern Wisconsin for nearly a century, so we understand the needs of our community.
Financing Available
We offer various options from financing partners to help you meet your specific needs and budget.
5-Star Customer Service
The Thielmann Group promises five-star customer service with every interaction.
Committed to Excellence
We complete jobs quickly without compromising our commitment to excellence.
Satisfaction Guarantee
Our team is dedicated to ensuring your 100% satisfaction with every service we perform.
Our Reviews
See What Your Neighbors Are Saying
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Anytown, ST
Anytown, ST
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer id condimentum a tortor vel. Et et nulla mauris, quam mattis tellus. Gravida morbi volutpat tristique praesent adipiscing nunc sit imperdiet. Sit mauris gravida ut rhoncus vel. Sed fermentum neque, ipsum aliquet. Venenatis purus est tincidunt sagittis
Anytown, ST
Anytown, ST
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer id condimentum a tortor vel. Et et nulla mauris, quam mattis tellus. Gravida morbi volutpat tristique praesent adipiscing nunc sit imperdiet. Sit mauris gravida ut rhoncus vel. Sed fermentum neque, ipsum aliquet. Venenatis purus est tincidunt sagittis
Anytown, ST
Anytown, ST
I've been using Thielmann Group for all my heating and air conditioning since I built my house 23 years ago. They have been great in emergency service and regular maintenance service. On time and very friendly staff. Would, and have, recommend them to anyone!
I have used Thielmann for both installation of a new furnace + A/C recently, but also an install of a ductless mini-split unit six years ago. I fully trust their brands and recommendations. I can't say enough of about this company. Every single person from administrative…