821 E. Lincoln Hwy. DeKalb, IL. 60115 • 1010 Jorie Blvd., Suite 390 Oak Brook, IL. 60523

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HVAC service your business can trust

Don't let an aging heating unit, faulty ventilation or malfunction cooling hinder your business' production and efficiency. Get a FREE estimate today on full service HVAC work at competitive rates and with the industry's best products.

What can we do to improve your business' energy performance?

We offer proper service and repair from trained technicians who understand the operation of your commercial equipment. We have extensive knowledge of roof top heating and cooling units, air conditioning chillers, hot water and steam boilers, modulating condensing boilers, air handling units, air to air heat exchangers, energy recovery ventilators, make up air units, direct digital controls, and pneumatic equipment. Our technicians average over 20 years of experience.

Maximize your business' energy now

1 Source Mechanical offers maintenance agreements to ensure minimum downtime as well as energy efficient operation. We can repair or replace any make or model. 1 Source Mechanical works with several architects, engineering companies, and general contractors. We can fabricate all different types of sheet metal or fittings and provide commercial remodel or new HVAC installations from start to finish.

Commercial HVAC value like never before

We have commercial leasing and financing options available. Always available 24 hours a day, 7 days a week. We are approved contractors for both Nicor and Peoples Gas and able to offer several rebates or discounts on qualifying equipment and services.

- Free Estimates

- 24/7 Emergency Service

- 100% Financing Available

- All Repairs 1 Year Labor Warranty

- Fully Insured, Licensed

  and Bonded

Why choose us?

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Start your commercial HVAC project with our FREE estimate today.


1 Source Mechanical Inc. is your locally owned and trusted heating, air conditioning, plumbing, and refrigeration contractor. We serve all of DeKalb County and the surrounding areas including all of DeKalb, Sycamore, Genoa, Malta, Sandwich, Cortland, Hinckley, Kingston, Kirkland, Aurora, Elgin, Maple Park and Elburn.