Temperature systems inc

your trusted hvac advising partner

Established in 1947, one of Wisconsin’s largest employee-owned HVAC/R distributors now serves northern Illinois, eastern Iowa, and Michigan’s Upper Peninsula. With distribution centers in Madison and Green Bay, services include product delivery, training, consulting, and expert technical support from a team of over 120 experienced professionals.

Honoring the Dealers Who Make Us Proud

From Carrier President’s Award winners to Tempstar Elite Dealers like Benjamin Heating & Cooling, we’re proud to celebrate the incredible partners who raise the bar in HVAC service, innovation, and customer care. It’s an honor to support and serve these top-tier professionals—learn more about what makes them the best in the business.

Meet Our Dealers

TSI Controls Expo | A Decade of Collaboration and Innovation

We’re grateful for our Carrier Controls Experts and longtime attendees who continue to elevate our industry.

Explore Controls

Announcing Our New President & CEO | Scott Nachreiner

TSI Leadership Announcement

Scott Nachreiner is stepping into the role as President & CEO after nearly a decade of growth at TSI. With deep industry knowledge and a strong connection to our people and values, he’s poised to lead our continued success as an employee-owned company.

“My whole heart is with this company—its incredible employees, trusted partners, and dedicated customers. Looking forward to leading and supporting our team through this next chapter!” – Scott Nachreiner

Read the Full Announcement

Proudly Nominated for WI Employee-Owned Company of the Year

As an employee-owned company, every team member at TSI shares in our success. Through our ESOP, employees aren’t just part of the team—they’re owners. This creates a culture where your ideas matter, your impact is valued, and your growth contributes directly to the company’s future.

Join Our Team

PROUDLY DISTRIBUTE

RIGHT PRODUCTS RIGHT NOW

Essential HVAC, hydronics, and controls—ready when you need them.
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Design Engineering Expertise

Innovative HVAC design support—from system analysis to energy efficiency and code compliance—tailored for long-term performance.
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Level Up with Tsi University

Fast, reliable help for equipment coverage, credits, and returns.

Start Learning ››

warranty support that works for you

Fast, reliable help for equipment coverage, credits, and returns.

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DRIVEN TO DELIVER

TSI ensures fast, reliable delivery with our fleet of trucks—providing on-time, accurate deliveries to keep your business running smoothly and your technicians equipped for every job.

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TEMPERATURE SYSTEMS INC

Temperature systems inc

your trusted hvac advising partner

PROUDLY DISTRIBUTE

RIGHT PRODUCTS RIGHT NOW

Design Engineering Expertise

Level Up with Tsi University

warranty support that works for you

DRIVEN TO DELIVER

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madison location

green bay location