Guelzow Heating & Air Conditioning

"Quality Installation & Service Since 1953"

About Us

Welcome to Guelzow Heating & Air Conditioning, your trusted HVAC experts in Wisconsin Rapids, WI, proudly serving the Central Wisconsin area since 1953. Our seasoned team is committed to delivering outstanding service across a spectrum of needs, including AC repairs, AC installations, furnace repairs, water heater installations, heat pump installations, and more. At Guelzow Heating & Air Conditioning, exceptional customer service is our hallmark. We offer free estimates and flexible financing options to make your HVAC projects accessible and budget-friendly. Additionally, our 24-hour emergency services ensure we're always available to meet your urgent HVAC needs. Reach out to us today and discover why we've been a trusted industry leader for over 65 years.

Our Story

Welcome to Guelzow Heating & Air Conditioning, your trusted HVAC Contractor serving the Wisconsin Rapids, WI area since 1953. With over six decades of experience, we have built a solid reputation for providing top-notch heating and air conditioning services for residential and commercial clients alike. Our commitment to quality workmanship, exceptional customer service, and reliable solutions sets us apart as a leader in the industry.

At Guelzow Heating & Air Conditioning, we specialize in a wide range of HVAC services to meet all your heating and cooling needs. Our team of skilled technicians is trained and certified to handle everything from in-floor heating installation to water heater installation, residential air duct cleaning, AC maintenance, AC repair, unit heaters, ductless heat pumps, ductless mini splits, gas fireplaces, furnace repair, furnace maintenance, radiant tube heaters, heat pumps, new construction installation, oil furnaces, boilers, hydronics, water heater service, high velocity HVAC systems, and more.

We understand the importance of a comfortable indoor environment, which is why we offer 24-hour emergency services to address any urgent heating or cooling issues that may arise. Our team is always ready to respond promptly and efficiently to ensure your comfort and safety. Additionally, we provide free estimates for all our services, allowing you to plan and budget for your HVAC needs with ease. We also offer flexible finance options to make our services more accessible and affordable for our valued customers.

Whether you need routine maintenance, repairs, or a new HVAC system installation, you can count on Guelzow Heating & Air Conditioning to deliver exceptional results that exceed your expectations. Our dedication to quality, professionalism, and customer satisfaction drives everything we do, and we take pride in helping our clients create comfortable and energy-efficient indoor spaces.

As a locally owned and operated business, we are deeply rooted in the Wisconsin Rapids community, and we are committed to serving our neighbors with integrity and excellence. When you choose Guelzow Heating & Air Conditioning for your HVAC needs, you can rest assured that you are receiving the best service possible from a team of experienced professionals who care about your comfort and well-being.

Contact us today to schedule your HVAC service or to learn more about our comprehensive heating and cooling solutions. Let Guelzow Heating & Air Conditioning be your trusted partner for all your HVAC needs in Wisconsin Rapids and the surrounding areas.

Areas Served

What We Offer

Our Specialties include:

24-Hour Emergency Services
Free Estimates
Finance Options
New Residential Services
Replacement Residential Services
Heating
Air Conditioning

Our Services include:

In-Floor Heating Installation
Water Heater Installation
Residential Air Duct Cleaning
AC Maintenance
AC Repair
Unit Heaters
Ductless Heat Pumps
Ductless Mini-Splits
New Construction Gas Fireplaces
Furnace Maintenance
Furnace Repair
Radiant Tube Heaters
Heat Pumps
New Construction Installation
Oil Furnaces
Boilers
Hydronics
Water Heater Service
High-Velocity HVAC Systems

Our Brands include:

Armstrong Air
Bryant
NTI Boilers

Testimonials

On 12/19/2025 Judith Klussendorf had this to say:
Coldest night of the year so far...my furnace quit, total quit. The technicians from Guelzow insulted in the new furnace and installed the new unit and thermostat. very respectful of my home, kind and friendly. Completed the install in a timely manner, finished by the time they had estimated, and left the area inside and outside of my home all cleaned up. Like a ghost they came, they fixed, they left no trace. Best of all the new unit they installed is prefect and it is so nice to be toasty again. Thank you, Guelzow Heating & Air Conditioning. Judith K. Testimonial written by Judith Klussendorf on this site.

On 12/10/2025 Luke had this to say:
My water heater began leaking out of the bottom a little over a week ago. Despite my best efforts I was unable to fix it so I called in on Monday morning to set up a time to get it looked at. They came out at 9:45 on Tuesday morning and gave me a quote, and at 1:30 the installation team came over to install my new water heater. The communication was great, the crew cleaned up well after themselves, and they tested all of the faucets in the house to make sure there were no more air bubbles in the lines. If I could give more than 5 stars I would

On 8/4/2025 Tristen Behr had this to say:
A/C S stopped working during a heat wave. Joel was very prompt upon arriving on got the problem solved within minutes. Great customer service. Testimonial written by Tristen Behr on this site.

On 7/30/2025 Judy Webb had this to say:
Great work Testimonial written by Judy Webb on this site.

On 7/28/2025 Anonymous had this to say:
. Testimonial submitted anonymously directly to this site.

Contact Us

Guelzow Heating & Air Conditioning
2030 7th St S Wisconsin Rapids, WI 54494
Phone: (715) 423-1086
Email: main@guelzowheating.com

Where To Find Us

Payment Types Accepted

American Express, Personal Checks, Debit Cards, Discover, MasterCard, Visa

Our Hours

24 Hour Emergency Service

Holiday Hours May Vary. Please Call For Details.

Monday: Open 24 Hours 24-Hour Emergency Service
Tuesday: Open 24 Hours 24-Hour Emergency Service
Wednesday: Open 24 Hours 24-Hour Emergency Service
Thursday: Open 24 Hours 24-Hour Emergency Service
Friday: Open 24 Hours 24-Hour Emergency Service
Saturday: Open 24 Hours 24-Hour Emergency Service
Sunday: Open 24 Hours 24-Hour Emergency Service

News

This season is all about comfort, joy, and peace of mind—and we’re here to make sure your home stays cozy no matter how cold it gets outside.
Whether it’s keeping the heat flowing or ensuring everything runs smoothly, Guelzow Heating & Air Conditioning is your trusted partner for year-round comfort.
✨ Holiday Tip: Schedule a quick system check—because nothing should interrupt your holiday cheer!
📞 Call us today
Happy Holidays from our family to yours!

Guelzow Heating & Air Conditioning has been officially recognized as one of the Top 3 HVAC Contractors in Wisconsin Rapids for the 2025 Wisconsin Rapids Award!
This achievement reflects our commitment to delivering exceptional service, quality workmanship, and comfort to our community.
Thank you to our amazing customers and team for making this possible! 💙

When the temperature drops, your home should stay warm and welcoming. At Guelzow Heating & Air Conditioning, we make sure your heating system is ready for the season—so you can focus on what matters most: family, comfort, and holiday cheer.
✨ Pro Tip: A quick furnace check now can prevent costly surprises later. Stay ahead of the cold!
📞 Call us today at 715-423-1086

💰 Keeping your home comfortable just got easier! Guelzow Heating & Air Conditioning is now offering financing options to help you upgrade or repair your heating and cooling systems without the upfront stress. Whether you need a new furnace, in-floor heating installation, AC repair, or even a high-efficiency ductless mini-split, we’ve got you covered — with flexible payment solutions that fit your budget. Stay cozy, stay cool, and stay comfortable all year long with Guelzow! ❄️🔥 #GuelzowHeatingAndAir #FinancingAvailable #HomeComfortMadeEasy #HVACExperts #StayWarmStayCool #WisconsinHomes #HeatingAndCooling #ComfortYouCanTrust

Info

Financing

FAQ

What HVAC services do you offer?

We provide a full range of HVAC services including AC repairs and installations, furnace repairs, water heater installations, heat pump installations, and more.

Where are you located and what areas do you serve?

We’re based in Wisconsin Rapids, WI, and proudly serve the Central Wisconsin region.

How long have you been in business?

Guelzow Heating & Air Conditioning has been a trusted name in HVAC since 1953, with over 65 years of experience.

Do you offer free estimates?

Yes! We provide free estimates to help you plan your HVAC projects with confidence.

Site Navigation