our company
Founded in 1947 by Charles Vaughn, Temperature Systems has grown into one of Wisconsin’s largest HVAC & R distribution companies. Serving northern Illinois, eastern Iowa, and Michigan’s Upper Peninsula, we’ve built a reputation on reliability, expertise, and long-standing partnerships.
With distribution centers in Madison and Green Bay, we proudly support HVAC & R contractors and dealers across the region. Our services extend beyond product delivery — we offer professional training, business consulting, system design, and technical support, ensuring our partners are equipped for success.
What truly sets us apart is our people. As an employee-owned company (ESOP), our team of over 120 dedicated professionals brings hundreds of combined years of industry experience to the table — committed to delivering exceptional service and trusted expertise every day.
partners in performance
customer focused
Be obsessed with taking outstanding care of our suppliers and customers. Every customer touch point is an opportunity to earn their loyalty.
ownership thinking
Responsibility and accountability to do the right thing for the business both in the short term and the long term.
respect others
Assume positive intent. Have a great attitude every day and work collaboratively with others.
evolve
Challenge the status quo for yourself and for the company. Learn, grow and improve everyday.
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1947 - Humble Beginnings
Wisconsin Furnace Company is founded and begins operations by acquiring Armstrong Furnaces for the Madison area.
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1966 – Strategic Expansion
Wisconsin Furnace Company acquires Kerscher Metal Service in Green Bay, a company with roots dating back to 1899.
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1967 – Embracing a New Identity
To reflect a broader product offering, the company rebrands to Temperature Systems, Inc., while Kerscher retains its name.
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1975 – New Partnerships
TSI secures the Carrier Franchise, expanding its HVAC product portfolio.
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1985 – Continued Growth
TSI adds the Bryant Franchise, and begins selling Tempstar, the new name for Whirlpool’s HVAC line.
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1988 – Unified Brand
Kerscher Metal Service officially adopts the Temperature Systems, Inc. name, combining two branches under one unified identity.
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2022 – Celebrating 75 Years
TSI Celebrated 75 Years of Service
our history
our capabilities
- 161,000 Square Feet
- Over 200 Product Lines
- 12,000+ SKUS In Stock
- Two Convenient Pick-up Locations
- Next Day Delivery
- After-Hours Emergency Service
- Customer Support Center
- Nationally Recognized Service Technicians
- Industry Leading Control Engineers
- Innovative Training Centers