Heating, Cooling, & HVAC Services In Oconomowoc, WI
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.

HVAC, Heating, and Cooling Services in Oconomowoc, WI

Your Local Heating & Cooling Experts since 1929

Welcome to The Thielmann Group, your trusted choice for superior HVAC, cooling, and heating services in Oconomowoc, Wisconsin. Our top priority is customer satisfaction, and we go above and beyond to ensure you receive the best service. From our team of Nate-certified technicians to our friendly office staff, we strive to deliver exceptional results.

As a Lennox Premier Dealer, Daikin and Carrier Dealer we take pride in offering products from top-of-the-line manufacturers. This prestigious designation sets us apart as one of the best heating and air conditioning contractors in Southeastern Wisconsin. Whether you require residential or commercial services, you can trust our team of professionals to get the job done right.

We understand the importance of a comfortable home or workplace, and that’s why we are committed to providing reliable heating and cooling solutions year-round.

For HVAC services in Oconomowoc, look no further than The Thielmann Group. Contact us online or call (262) 299-6197 to get started.

Heating Services

For all your Oconomowoc heating needs, turn to The Thielmann Group. Since 1929, our expert team ensures your equipment is properly sized and installed to the highest standards. We are confident that our heating products, installation, and services are the best in Waukesha County.

Lennox furnaces, known for their energy efficiency and quiet operation, coupled with our factory-trained and NATE-certified installation professionals, guarantee peace of mind with every new furnace or heating system.

If you encounter any heating problems in the local Oconomowoc area, our technicians will perform furnace repair services to promptly restore your heat. We understand the urgency of a “no heat” situation during harsh Wisconsin winters.

Our NATE-certified specialists are available 24/7 for emergencies, capable of servicing and repairing all makes and models. Don’t hesitate to contact us for any heating or furnace repair needs in the local Oconomowoc, WI area.

Oconomowoc, WI HVAC Repair Services

Air Conditioner Repair and Installation Services

If you’re looking for a new air conditioning system for your home or business, we have the perfect solution to keep you cool and fit your budget.

Our team provide innovative heating and cooling services for customers in Oconomowoc, Wisconsin and will ensure a flawless installation. Your new system will be perfectly sized to your space. Our technicians are factory trained and NATE-certified, equipped with years of knowledge to install your new central air conditioner or ductless system with superior workmanship.

We work on all types of cooling systems, including:

  • Air conditionersWe can work on all models of air conditioning systems for residential and commercial properties.
  • Heat pumpsWe can repair, replace, or maintain energy-efficient heat pumps that deliver warm air inside and outside the home.
  • Ductless mini-splits: We can service ductless HVAC units that provide total climate control for single rooms.

Our expert Oconomowoc AC repair specialists are here to service all major brands of cooling equipment. And don’t worry, if your air conditioner ever decides to give out at the worst possible moment, our 24-hour emergency service is always available to get your cooling system up and running at its best again in no time!

We proudly offer top-notch Lennox, Daikin, Carrier, Bryant and Mitsubishi air conditioning products, known for their industry-leading performance and energy efficiency. With these systems, you’ll stay comfortable during hot Southeastern Wisconsin summers while saving on energy bills. Give us a call for all your air conditioning needs in Oconomowoc, WI.

Indoor Air Quality

At The Thielmann Group we take pride in ensuring clean and healthy indoor environments for homes and businesses. From humidity control and air purification to duct cleaning and more, we offer HVAC solutions to improve your indoor air quality. Trust us to create a fresh and comfortable atmosphere for you and your loved ones.

  • Air purifiers
  • Humidifiers
  • Dehumidifiers
Oconomowoc, WI HVAC Repair Services

Why Choose The Thielmann Group

Since 1929, our team has been the go-to choice for top-quality residential and commercial HVAC services in Oconomowoc and beyond. Our NATE-certified technicians can service all brands, install Lennox-brand units, provide 24/7 emergency care, and more. Rest assured, we have you covered for all your HVAC needs! Plus, we offer upfront pricing, financing optionsspecial deals, and a job well done.

Contact us online or call (262) 299-6197 to schedule the HVAC services you need.

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!
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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.

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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.