Call   630-320-9393

815-517-0501

You know the job is being done right when you see a

1 Source Mechanical truck.

Your Premier Commercial Mechanical Services Provider

Commercial HVAC Company in Chicago

We provide premier mechanical services at very reasonable prices with excellent service and the least amount of hassle. The end result is ALWAYS a quality product that is budget effective and, most importantly, energy saving. 1 Source Mechanical, Inc. is your locally-owned and trusted commercial HVAC company in Chicago, specializing in heating, air conditioning, plumbing, and refrigeration.

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One Source. One call away.

Our strength is that we are able to provide value added services such as warranties, financing options, and service agreements that are tailored to each client’s unique situation. We take our time to hire specialists in all their respective fields and make absolutely sure they are up to date on each and every one of their respective certification.


1 Source Mechanical Inc. is your locally owned and trusted heating, air conditioning, plumbing, and refrigeration contractor. We serve all of the Chicagoland area.

Why choose us ?

24/7 Emergency Service  |  Union-Trained Employees  |  OSHA Certified
Technicians Average 20 Years of Experience  |  Fully Insured, Licensed, and Bonded
Request a Free Estimate Today

From DeKalb to Chicago, and everything in between.

We are here to serve you as a Chicago Commercial HVAC Company.

"We are proud to recommend 1 Source Mechanical as our go-to outside vendor for our large HVAC projects. I have been in the commercial real estate management industry for over 30 years and can think of no finer HVAC company out there. Dan Bargiel, the owner, is highly professional, extremely responsive, and always fair in terms of pricing. Especially in emergencies, we know we can always count on 1 Source for outstanding service."
Caroline Palmer, Vice-President
General Counsel
Hinsdale Management Corporation

Contact Us

Contact us in order to receive the best service in the industry. Call 630-320-9393 or 815-517-0501, or use the form below and we’ll reply back as soon as possible.

Homepage Contact Form

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