Better Buildings Start With Better Partners
As a full-service HVAC solutions provider, our mission is simple: we are your partner in performance, providing guidance and expertise from the earliest design conversations through installation and ongoing support.
As a member of Daikin Group, our team provides expert guidance at every stage of a project. From HVAC system design and equipment selection to building automation, service, and parts, we help customers make informed decisions and keep buildings operating at peak performance.
Solutions include:
- HVAC system design and engineering support
- Commercial HVAC equipment selection and purchasing
- Installation coordination and project support
- Preventative equipment maintenance and service
- Aftermarket HVAC parts sourcing and local warehouse
- Building automation and control systems integration
- Ongoing technical support from factory-trained professionals
We support commercial and industrial customers across Chicagoland, Central Illinois, Northern Indiana, and Iowa. With deep industry experience and strong partnerships with over 25 leading HVAC manufacturers, our focus is helping customers improve comfort, efficiency, and long-term system reliability.
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.
Clear and user-friendly solutions that seamlessly integrate your HVAC network to deliver precise climate control, proactive system maintenance, and simplified building management.
Our Daikin air-cooled rental chillers are built for fast deployment and flexible performance, delivering reliable cooling for emergencies, maintenance, or seasonal demand.
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
Unlocking Decarbonization with Daikin: Designing HVAC for The Future
According to the United Nations Environment Programme (UNEP), 40% of global energy is consumed by the building industry—an undeniable fact that is sparking change. As awareness grows, groundbreaking solutions in the HVAC industry are gaining momentum, reshaping the future of
Built To Last: Celebrating 25 Years of Thermosystems
When Thermosystems first opened its doors, it was more than just the start of a business – it was the beginning of a vision. Six individuals, driven by passion and determination, set out to build something that would stand the
When to Consider Chiller Rentals for Your Facility’s Cooling Needs
When outside temperatures rise, business operations expand, or unforeseen mechanical issues emerge, your HVAC system may require additional or supplemental support. We can provide you with Daikin’s air-cooled rental chillers, a dependable way to maintain optimal temperature control and operational
Meet The Experts: Service and Project Coordination
Every day, our service and project coordination teams serve as the backbone of our operations, bridging the gap across our numerous departments and ensuring seamless collaboration. These teams are essential to keeping our customers informed and achieving collective success. By
Expanding Dehumidification Solutions with Innovative Air Technologies
At Thermosystems, we provide comprehensive HVAC solutions tailored to meet the unique needs of our customers. We are thrilled to announce the addition of Innovative Air Technologies to our product and service line card, further enhancing our ability to deliver
Workplace Safety: Why It Matters in HVAC
Safety is the core of the HVAC industry, protecting both technicians and building occupants from risks like electrical hazards, fires, and health dangers. By prioritizing safety, HVAC professionals safeguard themselves, others, and the systems they maintain, ultimately creating a more
Navigating Refrigerant Changes: A Resource Guide
Staying informed about the latest refrigerant innovations is essential for remaining at the forefront of the HVAC industry. We’ve compiled a variety of resources to support your ongoing education. Video Resources Refrigerants’ energy consumption and potential impact on the ozone
PlasmaSoft: Transform Outdoor Air Calculations
What is PlasmaSoft? PlasmaSoft is an AHR EXPO Innovation award-winning, free software designed for building engineers that revolutionizes the way you approach outdoor air calculations. With PlasmaSoft, you can calculate how much outdoor air can be reduced compared to the ventilation
Meet the Experts: HVAC Tech Spotlight Part 2
At Thermosystems, our team of 24 dedicated technicians is the backbone of our success. Each day, they tackle challenges, assist our customers, and bring invaluable expertise to every project. Continuing our Meet the Experts series, we sat down with two
Optimizing Print Quality: The Importance of Humidity Control with Condair
Within the dynamic world of printing lies an incredibly important factor of success – humidification. Without proper humidity controls, printing facilities can run into problems like paper jams, cracked paper, ink smears, and other costly downtime. To meet quality expectations