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

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Expert training, optimum energy

Rest easy knowing your air quality, heating and cooling performance and energy efficiency are being monitored by technicians trained and certified at the top levels of their profession. Get your FREE estimate today!

We're your energy quality and safety experts

Anyone who works with potentially high-polluting machinery, such as air conditioners and refrigeration systems, must receive their EPA certification under Section 608 of the Clean Air Act. Enjoy the peace of mind of knowing your HVAC service is being handled by E.P.A certified and OSHA trained professionals.

1 Source Mechanical Inc. is certified in:

•E.P.A. Section 608 Universal Certified

•E.P.A. Cross Connection Device Inspectors

•E.P.A. Lead Certified RRP Firm

•OSHA 10 Hour training

•OSHA 30 Hour training

•Illinois Plumbing License #055-041842

Air testing and combustion analysis too!

Put our E.P.A and OSHA certified specialists to work on maintaining your home safety and efficiency with accurate and reliable testing for your air quality and combustion analysis for your furnace or boiler.

- Free Estimates

- 24/7 Emergency Service

- 100% Financing Available

- All Repairs 1 Year Labor Warranty

- Fully Insured, Licensed and Bonded

Why choose us?

Call for 24/7 emergency services!


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.