Hillestad Heating & Cooling Systems

Hillestad Heating & Cooling Systems is a HVAC company in Portage, Wisconsin, serving residential and commercial customers with comprehensive heating, cooling, and indoor air quality solutions. With over 30 years of experience, the company specializes in furnace and boiler installation, maintenance, and repair, as well as air conditioning services, ductless systems, and indoor air quality products. They provide service across Portage and surrounding communities including Lodi, Baraboo, Sauk City, and Wisconsin Dells. Certified HVAC professionals represent Bryant and Rheem products, offering Energy Star-rated equipment and a wide range of systems for every need. The company is licensed, bonded, and fully insured, and is known for same-day service, 24-hour emergency support, and free in-home estimates. With a 4.30 rating based on customer feedback, Hillestad is recognized for reliable, professional, and trustworthy service.

Founded in 1988 as a small team operating out of personal garages, Hillestad Heating & Cooling Systems grew from a grassroots start into a trusted regional leader. The company began in Lodi, Wisconsin, with five dedicated HVAC professionals who built their business through hard work and integrity. Their early operations took place in a dental office basement before moving to a dedicated industrial park location in Lodi, where they established a sheet metal shop that has since relocated three times to meet growing demand. Today, Hillestad continues to expand with a focus on quality, customer service, and long-term relationships, maintaining its family-owned roots while serving homes and businesses throughout southern Wisconsin.

Located on Brook Street in Portage, the business sits just a short walk from Riverside Park and the Wisconsin River, approximately 0.2 miles from East Wisconsin Street and 0.3 miles from the Portage Canal. It is also within a half-mile of the Columbia County Health & Human Services Building and the Cottage School, placing it in a well-connected, accessible neighborhood.

Hillestad Heating & Cooling Systems is recognized for its consistent, high-quality service and deep local roots. The company’s long-standing presence since 1988, combined with its reputation for honesty, technical expertise, and prompt emergency response, has established it as a trusted name in the region. Their authorized dealer status with Bryant and Rheem underscores their commitment to quality equipment and manufacturer-backed performance.

As a cornerstone of HVAC service in Portage, Hillestad Heating & Cooling Systems delivers dependable comfort and expert care to the heart of Wisconsin’s southern corridor.