about thermflo
Building a world where crucial systems never fail
ThermFlo provides complete, mission-critical power and cooling solutions that keep operations running without interruption. From engineering services and equipment installation to ongoing service and maintenance support, our end-to-end support ensures performance, reliability, and peace of mind—so your business stays powered as usual.
Our Story
Rooted in Legacy. Built for the Future.
Since 1969, the Izzo family has been at the heart of ThermFlo and Zonatherm Products. What began as Albert J. Izzo’s vision to go beyond equipment sales has grown into two companies united for a shared purpose… delivering reliable power and thermal solutions through deep customer relationships and trusted service.
1969
Albert Izzo founded Zonatherm and sister company ThermFlo the same day.
2002
Zonatherm became the exclusive industrial dealer for Generac® standby generators in the greater Chicagoland area.
2017
Opened new headquarters in Buffalo Grove, IL where sales company, Zonatherm, and service company, ThermFlo, under one roof.
2019
Celebrated 50 years in business.
Why thermflo
- Peace of Mind: Our turnkey approach means you get a single, accountable partner focused on performance, safety, and long-term operational assurance.
- End-to-End Expertise: From initial design to installation and long-term maintenance, ThermFlo delivers comprehensive solutions tailored to mission-critical environments.
- Uninterrupted Operations: Our systems are engineered to ensure continuous power and cooling, minimizing downtime and maximizing reliability.
- Customized Engineering: ThermFlo’s Special Projects division provides tailored engineering and consulting services for all infrastructure needs.
- Trusted Service Partner: With a dedicated service division, we support all major brands with preventative maintenance and rapid-response repair capabilities.
Our Leadership Team
A team approach to all we do
Dave Mack
President & CEO
Courtney Curtis
Chief Financial Officer
Claus Raddatz
Chief Operating Officer
Dave Piet
Chief Revenue Officer
Let’s build something reliable
Whether you’re planning a new project or upgrading existing infrastructure, we’re here to support you every step of the way.