Zonatherm has been the exclusive manufacturer’s representative in the Chicagoland area for Generac® Industrial Power since 2002

Generac power box panels. Zonatherm is the exclusive representative in Chicago, IL, for Generac products.

Product Lines We Represent

Generac Resources

Spec Sheets

Explore Generac solutions for a wide variety of industries.

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Product Brochures

View spec sheets for Generac gas generators, diesel generators, bi-fuel generators, and transfer switches.

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Keeping Businesses Powered Up Since 1959

Generac is the industry expert at engineering and manufacturing diesel, natural gas, and bi-fuel generators that ensure power at all times.

Innovative Solutions

Generac backup power generators can work alone or be paralleled to provide genset solutions.

Proactive Updates

Generac maintains compliance with ever-changing regulations, codes, and industry standards.

Energy Ratings

Generac is the only manufacturer to offer such a wide range of energy management products.

Exterior of Zonatherm and ThermFlo office building located in Buffalo Grove, IL

Experience you can rely on

Zonatherm and sister company ThermFlo have delivered mission-critical solutions in the critical power and cooling industry since 1969.

About Us


Supplying market-leading products and services you can trust


Saving you time and money with the best solutions available


Providing future-focused products and solutions

Ready to partner with Zonatherm for 100% reliability?

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