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

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Can't beat value on residential HVAC service

From installations to repairs to maintenance to upgrades, your home will get all the energy saving solutions it needs at unbelievable prices. Ask about our excellent warranty options!

How will you support me?

At 1 Source Mechanical we are available to repair or replace all makes and models of your heating furnace, air conditioner, hot water or steam boiler, heat pump, electric heater, air cleaner, humidifier, or hot water heater. We are available for air conditioning and heating service 24 hours a day, 7 days a week.

Full service HVAC work for your home

We offer maintenance agreements to keep your equipment in peak operating condition. We work with several lenders to offer financing options for all equipment replacements.

Want to save on HVAC service?

We are members of Nicor's Contractors Circle and we're able to offer many rebates and discounts on qualifying equipment and services. Contact us for a free estimate.

- Free Estimates

- 24/7 Emergency Service

- 100% Financing Available

- All Repairs 1 Year Labor Warranty

- Fully Insured, Licensed

   and Bonded

Why choose us?

residential full service hvac residential HVAC equipment HVAC Service

Enjoy a 1 year warranty on ALL residential installations


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.