The Premier HVAC Manufacturer’s Representative and Solutions Provider

serving Chicagoland, Central Illinois, and Northwest Indiana.

As an exclusive, full-service representative of HVAC equipment, parts, and service, our unwavering mission revolves around your comfort and well-being.

With our expertise, commitment, and steadfast support, we firmly believe that our success is intricately tied to yours. We stand as your trusted partner every step of the way.

  • Designing HVAC systems
  • Navigating the complex terrain of commercial equipment selection
  • Making crucial purchasing decisions
  • Overseeing seamless installations
  • Maintaining optimal system performance
  • Seeking reliable aftermarket parts

Our Solutions

Get competitive pricing from qualified experts on public bids by filling out our bid form.

Your expert source for HVAC parts, delivering prompt and precise solutions with a consistently growing robust inventory.

Dependable specialists providing customized service using factory parts, ensuring swift repairs with minimal ongoing maintenance.

Manufacturers We Represent

Markets We Serve

HVAC Excellence

Why Choose Us?

Trusted Advisors

Our factory training keeps us updated on industry innovations, allowing us to provide cutting-edge HVAC solutions. Our commitment to excellence ensures clients receive top-tier service and support in their projects.

Solution Providers

Our in-depth industry knowledge and unwavering commitment to excellence empower us to navigate complex issues seamlessly. Whether it’s optimizing system efficiency, addressing unique project specifications, or overcoming unforeseen hurdles, we are dedicated to delivering tailored solutions that surpass expectations.

Premier Equipment

We have strong relationships with reputable equipment manufacturers and a long-standing history of projects with well-respected building owners, engineers, general contractors, and the like.

Get to Know Us

In February of 2000, our founders came together with the goal of making commercial HVAC a smoother, more comfortable process for reputable building owners, architects, engineers, general contractors, and more. Learn more about us!

Read Our Latest Blog Posts

Meet the Experts: HVAC Tech Spotlight

HVAC technicians play a crucial role in ensuring the comfort and safety of our homes and businesses – installing, repairing, and providing routine maintenance and tailored solutions in a wide range of applications. At Thermosystems, we recognize the importance of

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Thermosystems blog post Northern Indiana Daikin Rep

Thermosystems, LLC. Expands into Northern Indiana

as Exclusive Factory Sales Rep for Daikin Thermosystems, LLC. is excited to announce its expansion into Northern Indiana as the exclusive factory sales representative for industry-leading brand Daikin Applied Americas and Daikin Comfort. This marks a significant milestone in the

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Enhancing HVAC: Welcome Indeeco!

Register for I-Heat I-Heat makes it easy to select all your heating products, with no downloads required and regularly updated, relevant information. It also produces accurate technical documents pertaining to your specific selections. Utilizing I-Heat saves you time and gives

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