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Hillestad Heating and Cooling sells only products manufactured by the most trusted names in the industry. Products proven to be energy efficient, cost efficient and environmentally safe.

Enrgy Sta

ENERGY STAR is a program that was created by the US Environmental Protection Agency (EPA) to help businesses and individuals make energy efficient purchases.








bryant rooftop furnace air conditioner

Hillestad Air Conditioning and Heating offers a wide selection of service for all for all Commercial Air Conditioning, Heating & HVAC systems in the Dane, Columbia & Eastern Sauk County area. From preventive maintenance programs to full HVAC system installations to air conditioning service and repairs. Our in-office departments and fully licensed specialized technicians are ready to help in all your commercial HVAC needs.

We service all makes and models of air conditioning units, so you can be assured we can get the job done.

We understand that you have many choices when it comes to your commercial air conditioning, heating, & HVAC needs, which is why Hillestad Air Conditioning and Heating is committed to providing your business with the best service possible.


Bryant Commercial Heating

Hillestad provides system repairs, replacement, and new construction. Hillestad specializes in assisting restaurants, hotels, and commercial property. We do not force a certain brand or product on our customers. Instead, we work together after a thorough assessment of the need to form an individualized plan to ensure the most energy efficient heating and cooling products.

We provide service, maintenance, and installation of:

  • Central Heating and Air Conditioning Computer Rooms

  • Chillers

  • Boilers

  • Radiant infrared heat

  • Ductless split systems

  • Heat pumps

  • Cooling towers

  • Various mechanical repairs

  • Various Refrigeration maintenance and repairs

  • Gas piping

Property Management

Hillestad specializes in assisting property owners with all heating and cooling needs. We offer 24/7 service for your peace of mind. We can offer preventative maintenance agreements or on an as-needed basis. We are perfect for owners and managers that travel or reside elsewhere. Let us take care of your guests or tenants to ensure proper air quality and comfort. Call us today for a free estimate or to discuss your HVACR property maintenance needs.



commericial refrigeration

Headquartered in Lodi, Wisconsin, Hilestad provides HVACR repair service to small businesses in Columbia and Eastern Sauk Counties

We understand the critical aspects of getting your problem solved immediately so you can continue operations without any interruptions.

Superior Customer Service

We provide the prompt and courteous service that you expect! QUALITY WORK THAT LASTS!

Refrigeration – Stay Cool

Servicing: Ice Machines, Walk-in Coolers, Basic Refrigeration, Supermarkets, Commercial Freezers, Commercial Refrigeration Coolers, Walk-in Freezers Supermarkets, Bakeries, Catering Halls, Cold Storage Facilities, Commercial Ice Machines, Convenience Stores, Hotels and Motels.



Triangle Tube Commercial boilers

Hillestad Heating and Cooling installs and repairs boilers! Give us a call to find out if a boiler system is right for your BUSINESS

We’ll discuss this type of heat somewhat vaguely, because these systems can vary from one extreme to another. It would take up the size of a large book to describe these types of systems you wanted to get into the finer details. Older systems (50 years old) that use radiators may be hot water or steam. Some people don’t know the difference, and the differences can be huge.

Review the two types of Boiler Systems below and contact us for more information and schedule an analysis of which system will best fit your needs.


You’ll enjoy all the benefits of heating with oil in addition to saving money with AFUEs of 87%. Buderus brings you an ingenious combination: a modern, environmentally-friendly oil boiler plus the ultra-efficiency of cutting-edge technology.


Excellence. Ingenuity. Efficiency. Three distinct qualities that have made Triangle Tube an industry leader. For over 60 years, we’ve provided innovative ideas to the North American heating and hot water industry; for residential, commercial and industrial applications. We proudly offer a complete line of stainless steel hot water heating products. Each of our carefully designed, peak performing products reflects an abiding concern for sustainability and low ownership cost.





Take Total Control of the Comfort of Your BUSINESS ENVIRONMENT

The air inside your business is essential for more than just comfort—it’s essential for life. It impacts your employee's health and the company budget. That’s why it’s reassuring to know that with Aprilaire, you can be in complete control of your indoor air. Aprilaire goes beyond simple temperature control, to include all aspects of indoor air quality, including:

All of these indoor air essentials come into perfect balance with one single, easy-to-use control.

If you wish to isolate specific air quality issues, Hillestad and Aprilaire products offer a range of control options to suit your individual needs. You can address the issues you have—not the ones you don’t.

Aprilaire has been delivering Total Comfort solutions for more than 50 years. Their products work with all leading brands of heating and cooling equipment. We will get the most comprehensive line of solutions available today for you to choose from.

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