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The Thielmann Group

★★★★½ 4.9/5 (100 reviews)
17020 W National Ave, New Berlin, WI 53151 (262) 786-2000 Website
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Reviews (100)

John Widby
John Widby
★★★★★ Jan 20, 1970

Very experienced. They were in and out in just a few hours. They replaced the outside compressor unit and the coil assembly inside with new lines. Very professional, kind, respectful.

Krista Dorner
Krista Dorner
★★★★☆ Jan 20, 1970

I have been pleased with the Thielmann group's service. A couple years ago they quickly fixed my furnace, and drove to pick up a new circuit board. Recently I had my AC replaced. There were a couple issues with the unit/install but they were prompt to fix it so I am pleased. Thank you.

Karen Brenneman
Karen Brenneman
★★★★★ Jan 20, 1970

We had a high-efficiency boiler installed along with four thermostats and four zone valves replaced.

TJ LaChance
TJ LaChance
★★★★★ Jan 20, 1970

Great people to work with. Excellent price's and top notch service techs. Treat you like family would highly recommend.

David Walker
David Walker
★★★★★ Jan 20, 1970

Great customer service, Sara & Dawn are wonderful and the install team was on site on time and very knowledgeable and professional.

Theresa Kenneweg
Theresa Kenneweg
★★★★★ Jan 20, 1970

I have been working with Roth Heating for over 25 years. They have always been great to work with. Professional, friendly, and explain everything they are doing. Their service technicians are amazing and the office staff is as well. I won't work with any other HVAC contractor.

PS Labs
PS Labs
★★★☆☆ Jan 20, 1970

The installation and equipment is great so far, and that is what is saving this review from being lower. Had the estimator out to look at the job, was told I would be contacted about the additional pricing (I won a bid for unit and installation but required additional work) and to get the job scheduled. Heard nothing for 7 days, so I finally called and was able to get it scheduled. Installation day went fine. They were wrapping up and asked about payment. Turms out, it was cash or check for the price I was quoted and they didn't have a means to process my credit card - neither of which I was told. They were able to take my card info and process several days later. Scary having someone write down all your card details, though. I was told they'd need to come back in a few weeks to finish hooking up the humidifier water line and do the AC start up. I waited three weeks to get scheduled with no contact. Again, I had to call to arrange. Install - fine Communication - lousy

Laverne Barta
Laverne Barta
★★★★★ Jan 20, 1970

The installation was very well done. All installation was done in less than a day. A thorough explanation of how the system worked was provided. The new system operates very quietly.

Thomas Kraklow
Thomas Kraklow
★★★★★ Jan 20, 1970

Top notch company to deal with. The initial consultation took an hour and was so thorough that I could not choose another company. The install went smoothly too! I love our new Furnace and AC and like my remote access to my thermostats! I highly recommend this company for all your heating and AC needs!

William Schneider
William Schneider
★★★★★ Jan 20, 1970

Installers were on time (a few minutes early), friendly, polite and happy to answer any questions I had. They cleaned up all debris when finished. Install took a little over 2 hours start to finish. Company even activated the warranty for me without my asking. Highly recommend.

Brenda & Wayne Myers
Brenda & Wayne Myers
★★★★★ Jan 20, 1970

Installation was done very quickly. They cleaned up and explained new thermostat.

Travis Whitty
Travis Whitty
★★★★★ Jan 20, 1970

The team was really respectful, efficient and clear in what work they were doing for us. Would definitely recommend to others and have them in our home again!

Casey Pietrzak
Casey Pietrzak
★★★★★ Jan 20, 1970

Fast, cortious, all done in one day, so far boiler working beautifully, would recommend this company.

Sue s Tillman
Sue s Tillman
★★★★★ Jan 20, 1970

The two installers did a excellent job of installing a Lennox furnace and air conditioner. They explained the new heating and cooling system and answered any questions we had.They were very nice and cleaned up the jobsite. I would highly reccomend using The Thielmann Group.

Super 19kh
Super 19kh
★★★★★ Jan 20, 1970

Five star service. On time, professional, and took care to clean everything up before leaving. Very good experience, would recommend to anyone in need of HVAC work.

Charles Siebert
Charles Siebert
★★★★★ Jan 20, 1970

There were a couple of issues associated with the product and installation but they were quickly addressed.

Frank Nameth
Frank Nameth
★★★★★ Jan 20, 1970

The experience from Dave's visit and quotation to Jon and his crew's installation was excellent and seamless. We are very happy with the entire project.

Debra H
Debra H
★★★★★ Jan 20, 1970

Our furnace needed to be replaced; responded quickly and gave a fair price. Had us up and running quickly. I could not believe how efficiently they did our install.

Sue L.
Sue L.
★★★★★ Jan 20, 1970

Great service. Answered all questions and walked me through the purchasing process with care.I also felt I received a fair deal.

Christin Cilento
Christin Cilento
★★★★★ Jan 20, 1970

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 to technicians to sales is top notch. They hire solid people that care about their job performance and the customers they serve. Everything is stamped with attention to detail and timely, respectful, professional service. THE BEST.

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