HVAC Services in Sauk City, WI

Trusted Heating, Cooling and Indoor Air Quality Solutions in Sauk City, WI

Hillestad Heating and Cooling Systems proudly serves Sauk City with high-quality HVAC service backed by decades of local experience. From heating system repairs in the dead of winter to air quality upgrades in the summer, our licensed technicians are ready to help. We work hard to keep your home or business running at peak comfort and efficiency.

HVAC Services We Offer in Sauk City

From Lake Wisconsin to the Ferry Bluff State Natural Area, we’ve got your comfort covered. Our services include:

Heating Services

• Furnace repair, replacement and installation

• Boiler service and maintenance

• Seasonal tune-ups

• Emergency heating repairs

Cooling Services

• A/C repair, maintenance and installation

• Ductless mini-split systems

• High-efficiency system upgrades

• Central air troubleshooting

Indoor Air Quality

• Whole-home air purification

• Humidifiers and dehumidifiers

• Ventilation solutions

• Filter replacement and upgrades

Commercial HVAC and Refrigeration

• Rooftop units and packaged systems

• Walk-in cooler and freezer service

• Boiler systems and gas piping

• Custom maintenance agreements

We service all major brands, and we’ll always provide honest recommendations tailored to your home or business.

Why Sauk City Homeowners and Businesses Trust Hillestad

Back in 1988, Hillestad was five hardworking HVAC pros in a garage, united by one mission: to offer better heating service with a personal touch. Decades later, that mission hasn’t changed.

Here’s why customers across southern Wisconsin continue to choose Hillestad Heating:

• Local and Family-Rooted: Proudly located in Lodi and supporting our surrounding communities since 1988.

• Experienced Technicians: Skilled, certified and constantly trained.

• Prompt and Professional: We show up on time and do it right the first time.

• Energy-Efficient Solutions: We’ll help you save money and stay warm.

• Clear and Honest Quotes: No pushy upsell. No surprises.