Critical HVAC Systems, LLC.

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United States
Rolling Meadows, IL
Critical HVAC Systems, LLC.

Expert Commercial & Industrial HVAC services throughout the Chicagoland area.

05/25/2026

Today, we pause to honor and remember the brave men and women who made the ultimate sacrifice for our freedom. Their courage, dedication, and service will never be forgotten.

From all of us at Critical HVAC Systems, we extend our deepest gratitude to those who served and to the families who carry their legacy forward.

Wishing everyone a safe and meaningful Memorial Day.

05/06/2026

Downtown Chicago skyline views and a brand-new rooftop unit. 🏙️💪

wedidthat

03/06/2026

Today is Employee Appreciation Day and we couldn’t be more grateful and proud of this team.

Their work ethic, teamwork and dedication to doing things the right way is what makes our company what it is today.

Thank you for being the heart of our family.

01/13/2026

We are keeping buildings warm, systems running and businesses operating without interruption, no matter how low the temperatures drop.

01/01/2026

Happy New Year from all of us at Critical HVAC Systems! Wishing our partners, clients, and team a year of success, growth, and reliable comfort ahead.

#2026

12/25/2025

Holiday party mode: ON 🎉🎊🎄⛄❄️

Celebrating the season with the team that keeps things running year round. Cheers to our amazing crew for another year of hard work. Wishing everyone a warm, safe, and very Merry Christmas from all of us at CRITICAL HVAC SYSTEMS!🎄✨

11/27/2025

This Thanksgiving, we’re grateful for the projects completed, systems optimized, and the trust our clients place in us to keep their facilities running safely and efficiently. We are incredibly thankful for the amazing team that makes it all possible. Happy Thanksgiving from our team to yours. 🍂🦃

11/18/2025

Another successful installation.💪

Replaced an existing 10 MMBTU boiler with four Lochinvar FBN2001 condensing boilers. These new units operate at 96.2% efficiency, providing a major improvement over the previous system, which ran between 78–80% efficiency. The Lochinvar FBN2001 features a high performance fire tube heat exchanger and a wide turndown ratio, allowing it to maximize heat transfer, reduce fuel consumption, and maintain efficient operation under varying load conditions. This advanced design makes it an ideal choice for large commercial heating applications where energy savings, reliability, and long term performance are essential.

11/06/2025

Where art meets amperage. Every line, breaker, and timer tells a story of control, safety, and precision. Our team keeps systems running safely and efficiently, one panel at a time. 🔩

10/31/2025

This Halloween, stay warm, stay safe, and let Critical HVAC Systems handle the chills! HAPPY HALLOWEEN!!

Address

5400 Newport Drive, Suite 1
Rolling Meadows, IL
60008

Telephone

+18335974822

Website

http://www.criticalhvacsystems.com/

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