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Commercial Services

We specialize in rooftop unit maintenance, repair and installation. Replacing air filters, lubricating motors and cleaning condenser coils can save you thousands. 


Contact our team today to schedule your rooftop maintenance. We offer annual contracts catered to your building in order to keep your system running safely, efficiently and accurately.


Service agreements will limit major breakdowns and we guarantee same day service with major discounts.  

Rooftop Unit Maintanence

Maintenance agreements guarantee same day service and discounts of up to 15% on repairs and new installations. Allow us to keep your customers safe and comfortable while enjoying the comforts of your facility. Put your mind at ease by allowing O-Zone to take care of your HVAC needs.

Geothermal HVAC Systems

Go green with O-Zone installed Geothermal HVAC systems. We partnered up with some of the industry leading companies through The Geothermal Alliance of Illinois, to offer you green energy systems from the ground up. Reach out to us to find out how you can take advantage of government lead incentives, while helping reduce your carbon footprint. We offer services including, planning, repairs, maintenance and installations.

Geothermal Services

For more information click on the Geothermal Alliance of Illinois logo.

Mini-Split Systems

Mini-split systems provide excellent solutions to small apartments, room additions, office and server rooms for non-ducted areas where installing ductwork for a central AC system is not feasible. These ductless systems provide superior efficiency and comfort with state of the art technology. O-Zone specializes in the installation of air source and ground source heat pumps, including VRF systems for major commercial projects.

Commercial Heating Systems

We install and maintain direct gas-fired heaters and unit heaters for the commercial industry. We can help design and install heating systems for all size buildings including commercial hydronic boiler systems.

What Our Clients Say


Illana M, Mill Creek Early Childhood Program

Our heat was out at our school and not only did they come out right away to diagnose the issue they came back the same day and stayed late into the night to install a new system and ensure the building was warm for the following day! During the process they explained exactly what was wrong (in terms I could understand) and communicated every step of the way.

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