Commercial Heating Contractor | SE Wisconsin HVAC
Same-Day Service
Heating and cooling emergencies happen when you least expect them. Contact the professionals at The Thielmann Group to assess and fix the situation you're dealing with. We have the necessary skills and tools to fix your system so you can safely use it once again. Call the Thielmann team at (262) 299-6197 to get emergency HVAC services in Southeast Wisconsin.

Commercial Heating Contractor in Southeast Wisconsin

Your commercial building in Southeast Wisconsin needs reliable heating for warmth during the colder seasons. Commercial properties require a higher performance to maintain even, dependable heating. Fortunately, The Thielmann Group provides top-notch commercial heating services to Southeast Wisconsin.

With over 90 years in the industry, we’ve gained the tools and knowledge to tackle virtually any commercial heating service you need. No matter what type of heater you rely on, we’ve got you covered!

Ready to get started? Call (262) 299-6197 to set up a commercial heating service today. 

Thielmann HVAC technician forming ductwork for a commercial heating project

Commercial Heating System Installation & Replacement

Our dedicated technicians work hard to provide our community with quality commercial heating installations and replacements. We will guide you in selecting the right system for your specific needs, followed by a prompt and professional installation or replacement.

We proudly provide services for the following systems:

Commercial Heating Repairs

When issues arise, schedule a commercial heating repair with our team quickly. Failure to do so can lead to worsening issues that could have been prevented. Left unaddressed, heating problems can also result in total system failure. Ensure you never go without heating at your commercial property with our reputable commercial heating repair services! Keep an eye out for the following signs a repair is due:
  • Uneven heating
  • Cold spots around your building
  • Short-cycling
  • Off-putting smells or sounds
  • Unusually high energy bills
If you’re facing any of the above or another issue, schedule a commercial heating repair with us at (262) 299-6197 today.

Prevent Costly Repairs With Regular Commercial Heating Maintenance

Routine maintenance is needed for proper upkeep of your commercial heating system. The Thielmann Group provides skilled annual maintenance services to ensure your heater is pristine. We will thoroughly inspect and clean your system and run tests to guarantee everything works as it should.

Set up a commercial maintenance appointment at (262) 299-6197 today.

Why Choose The Thielmann Group?

Providing exceptional commercial heating services since 1929, The Thielmann Group is made up of NATE-certified, background-checked technicians who are here to help you. We offer same-day services, upfront pricing, free estimates on replacement quotes, and financing options for your added benefit. We conveniently service all brands and are a Lennox Feel the Love partner!

The Thielmann Group: Offering Reliable Heating & Cooling in WI for Over 90 Years! Schedule services with us today at (262) 299-6197.

Commercial Heating FAQs

If your commercial heater is not the size you need, it can result in a lack of performance. If the system is too small, it likely won’t be able to heat your entire property adequately. If it’s too big, it can result in an overproduction of heat that will leave your space too warm and leave you with high energy consumption and utility costs.
If your commercial heater is over 15 years old or needs frequent repairs, it’s probably time to consider a system replacement.

Read Reviews by Our Customers

Excellent
Based on 520 reviews
Michael Bania
Michael Bania
May 12, 2024
From the beginning of the process with sales call with Dave through the complete installation, your staff were exceptionally professional and helpful.
Tanya Newbauer
Tanya Newbauer
May 7, 2024
Theilmann was the only company out of two others, that told us about code requirements for our furnace being on the first floor. They did an amazing job with it being in a small spot and loved our dogs!
Bobi Brouse Bertling
Bobi Brouse Bertling
May 6, 2024
The Thielman group is great. They were right on time, efficient and did an excellent job. My only struggle is with the digital thermostat. I wish I had a better understanding of programming it. I would highly recommend this company to anyone.
Paul Durbak
Paul Durbak
May 4, 2024
Our old furnace quit. We called our old service provider, and the old furnace needed a very expensive replacement part. He also tried to sell us equipment we did not need. Being Costco members, I called Costco, and they forwarded our call to Thielmann. Jason called, and gave us a price for a new furnace. He came out the same day, and the price quoted over the phone was what we paid. The installation was scheduled, and we are very happy with the equipment and the service. Using Costco, we also got a nice rebate. Thanks.
John Spors
John Spors
April 19, 2024
Very professional and prompt. We are happy with our new furnace and recommend Thielmann for service and HVAC installation.
Donald Trapp
Donald Trapp
April 19, 2024
Salesman came in and looked at both the furnace and air conditioner and we agreed to get new ones. He was very helpful. Also, the guys that came in and installed both were polite and good at their installation. Would recommend Thielmann.
Shannon O
Shannon O
April 19, 2024
Upon our first call to Theilmann Group with a furnace problem, thru to a new furnace and air conditioner. Everyone we encountered was professional and a pleasure to have in our home. This was not a planned purchase, but they made it as easy as possible. Highly recommend!!
J Knox
J Knox
April 19, 2024
Thielmann did a tremendous job replacing our Carrier furnace. They worked with us to make sure we were able to get the right product and even worked with Carrier on the issues we were seeing on our old furnace as it was failing sooner than it should have. The team was very professional and efficient. Great experience. We highly recommend them.
Tim Schumacher
Tim Schumacher
April 17, 2024
Stop shopping around and call Thielmann & Sons. Wayne, Chris and the team made it so easy, and made sure we understood all options and their impact to our home. Not only did they provide the information you look for in a home expert, but they gave us confidence that the price, timing, and install would go as planned, AND IT DID! They won't upsell you if you don't need it, and if they urge you one way it's because is it's the best option for you. Thanks to the whole team!
Start Saving Today With

Membership Perks

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.

Review Image
Our Reviews

See What Your Neighbors Are Saying

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!

Paul K.

Paul K.

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…

Christin C.

Christin C.

They performed an April Air install for us. Very professional, fast, knowledgable and responsive. Best price compared to the other places I called. They thought there may be difficulties installing due to our furnace set up, but were still willing to come out and try and…

Jenni S.

Jenni S.

The Thielmann group team was professional, knowledgeable, and on time. They did a fantastic job at a reasonable price. From our first encounter, we could understand how experienced the group was. There were no issues, and the new furnace worked perfectly. I highly recommend them.

Vincent R.

Vincent R.

Thielmann Group installed a new furnace and heat pump for us. We have been using them for HVAC maintenance for several years and were always happy with their service. We got quotes for the new system from a few companies and we were pleased that they…

Laurie K.

Laurie K.