Thielmann Heating, Cooling & Plumbing Offering Reliable Heating &
Cooling
For Over 90 Years Southeast Wisconsin HVAC Experts Deals and Promotions

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Our Deals

Save On Your Service Today

March Madness!

NO Dispatch Fee with Purchase of Any Repair

Request Service Expires 03/31/2025 Cannot be combined with any other offers. Must present coupon at time of service.

With Purchase of AC

FREE Furnace

Request Service Expires 03/31/2025 Cannot be combined with any other offers. Forced air systems only. Must present coupon at time of service.

Various Plans To Fit Your Budget

0% Financing for 36 Months

Request Service Expires 03/31/2025 Terms And Conditions May Apply. For Mitsubishi Mini-Splits Only. Dependent On Financing Approval.

Purchase a Membership, Get

$100 Plumbing Service Credit

Request Service Expires 03/31/2025 Terms & Conditions May Apply. Cannot Be Combined With Any Other Offers. Must Present Coupon At Time Of Service.

$500 Off Tankless Water Heaters

Request Service Expires 03/31/2025 Terms & Conditions May Apply. Cannot Be Combined With Any Other Offers. Must Present Coupon At Time Of Service.

$150 Off Water Heaters

Request Service Expires 03/31/2025 Terms & Conditions May Apply. Cannot Be Combined With Any Other Offers. Must Present Coupon At Time Of Service.

March Madness!

NO Dispatch Fee with Purchase of Any Repair

Request Service Expires 03/31/2025 Cannot be combined with any other offers. Must present coupon at time of service.

With Purchase of AC

FREE Furnace

Request Service Expires 03/31/2025 Cannot be combined with any other offers. Forced air systems only. Must present coupon at time of service.

Various Plans To Fit Your Budget

0% Financing for 36 Months

Request Service Expires 03/31/2025 Terms And Conditions May Apply. For Mitsubishi Mini-Splits Only. Dependent On Financing Approval.

Purchase a Membership, Get

$100 Plumbing Service Credit

Request Service Expires 03/31/2025 Terms & Conditions May Apply. Cannot Be Combined With Any Other Offers. Must Present Coupon At Time Of Service.

$500 Off Tankless Water Heaters

Request Service Expires 03/31/2025 Terms & Conditions May Apply. Cannot Be Combined With Any Other Offers. Must Present Coupon At Time Of Service.

$150 Off Water Heaters

Request Service Expires 03/31/2025 Terms & Conditions May Apply. Cannot Be Combined With Any Other Offers. Must Present Coupon At Time Of Service.

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What To Expect

Discover the Thielmann Heating, Cooling & Plumbing 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

Thielmann Heating, Cooling & Plumbing 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

Thielmann Heating, Cooling & Plumbing 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.

ABOUT US

Heating, Cooling, and HVAC Services in Southeastern Wisconsin

Servicing All Your Residential and Commercial Needs

Thielmann Heating, Cooling & Plumbing has provided quality heating, cooling, and HVAC services to Southeastern Wisconsin since 1929. We offer residential and commercial installation, replacement, repair, and maintenance services in Oak Creek, New Berlin, Milwaukee, Hartford, Burlington, Wauwatosa, and the surrounding areas. The team at our HVAC company is proud to offer timely service and competitive pricing in your local area.

Our technicians pay attention to the small details and are willing to go the extra mile for our customers! Our certified HVAC and indoor air quality technicians do whatever it takes to keep our customers comfortable. When you work with our skilled professionals, you can rest assured that your home will remain comfortable during our hottest days and coldest nights.

Contact Thielmann Heating, Cooling & Plumbingat (262) 299-6197 today to schedule residential or commercial heating, cooling, or indoor air quality services in Southeastern Wisconsin.

Quality Cooling and Air Conditioning

Summers in Wisconsin can be unbearable without a cooling system that you can trust will keep you cool and comfortable. Our team will ensure that your air conditioning, ductless mini-split, heat pump, and packaged units work at their best regardless of the temperature. Our team can install, replace, repair, or maintain whatever unit your business or home has.

Dependable Heating in Wisconsin

Thielmann Heating, Cooling & Plumbing knows the importance of a reliable heating system in Wisconsin. Whether you need residential or commercial heating services, our team has you covered. We offer HVAC installation, replacement, repair, and maintenance services for gas and oil furnaces, heat pumps, boilers, ductless mini-splits, and packaged units!

Indoor Air Quality Services

Our indoor air quality specialists can improve the air quality in your home or commercial property by assessing your air quality and recommending the best solution for your Wisconsin home or business. The technicians at our HVAC company can install, replace, repair, and maintain air purifiers, humidifiers, and dehumidifiers. We also offer duct cleaning services to ensure your air is always free of dust and debris. Call Thielmann Heating, Cooling & Plumbing at (262) 299-6197 or contact us online to schedule heating, cooling, or indoor air quality services in Southeastern Wisconsin.

Our Reviews

See What Your Neighbors Are Saying

I liked my experience with them. The guys I spoke with prior to doing the work, the estimation phase , and the ones I spoke with after the work was completed had enough knowledge and suggestion to answer all my questions. I’m pleased with the job…

De'Angelo T.

Excellent team from start to finish. They were all very respectful of our property, as they promptly and professionally went about their task of installing a new air conditioner system. The system works very well, so far. It is also much quieter than the previous 40+…

Jerry W.

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…

J. K.

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.

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.

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Why Choose Thielmann Heating, Cooling & Plumbing?

Offering Reliable Heating & Cooling in WI for Over 90 Years

Same-day services
Licensed & insured
NATE-certified & background-checked technicians
Free estimates on replacement quotes
Maintenance plans available
Upfront pricing & financing options
Military, veteran & senior discounts
A+ rating from the Better Business Bureau
Lennox Feel the Love partner

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Proudly Serving

Southeastern Wisconsin

We're Hiring

Check Out Our Open Positions

Learn More

Request Service

Home Banner

Heating

Air Conditioning

Air Quality

Plumbing

Heating

Air Conditioning

Air Quality

Plumbing

Request Service

Mobile Home Banner

0% Financing Available

Same-Day Approval

Our Deals

Save On Your Service Today

NO Dispatch Fee with Purchase of Any Repair

FREE Furnace

0% Financing for 36 Months

$100 Plumbing Service Credit

$500 Off Tankless Water Heaters

$150 Off Water Heaters

NO Dispatch Fee with Purchase of Any Repair

FREE Furnace

0% Financing for 36 Months

$100 Plumbing Service Credit

$500 Off Tankless Water Heaters

$150 Off Water Heaters

What To Expect

Discover the Thielmann Heating, Cooling & Plumbing Difference

Fully Licensed & Insured

Trusted Since 1929

Financing Available

5-Star Customer Service

Committed to Excellence

Satisfaction Guarantee

Fully Licensed & Insured

Trusted Since 1929

Financing Available

5-Star Customer Service

Committed to Excellence

Satisfaction Guarantee

Heating, Cooling, and HVAC Services in Southeastern Wisconsin

Servicing All Your Residential and Commercial Needs

Quality Cooling and Air Conditioning

Dependable Heating in Wisconsin

Indoor Air Quality Services

Our Reviews

See What Your Neighbors Are Saying

Request Service

Request Service

Why Choose Thielmann Heating, Cooling & Plumbing?

Offering Reliable Heating & Cooling in WI for Over 90 Years

We're Hiring

Check Out Our Open Positions

New Berlin

Slinger

Oak Creek

Burlington

Waterford

Menomonee Falls