About Zonatherm
Building a world where crucial systems never fail
Zonatherm Products delivers expert solutions in power and cooling systems designed for essential and mission-critical environments.
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 Zonatherm
- Total Energy Solutions: We deliver Generac Industrial Energy’s full lineup of industrial generators—built for durability, scalability, and mission-critical performance.
- Leading Thermal and UPS Solutions: As a factory-authorized Vertiv partner, we provide trusted thermal and UPS systems known for reliability, efficiency, and smart infrastructure.
- Trusted Power Protection Solutions: We offer power protection solutions from Southern Tier Technologies to meet today’s operational standards.
- Expert Engineering Team: Our knowledgeable engineers and system specialists bring deep expertise to every project, ensuring tailored solutions and seamless execution.
- OEM-Backed Reliability: With direct factory support, certified parts, and warranty-backed service, our team ensures long-term system performance and peace of mind.
- Turnkey Project Delivery: From consultation to design, installation, and 24/7 service, our team supports the full lifecycle of your thermal and power infrastructure.
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
Memberships & Affiliations
We are proud members of several professional associations throughout Chicago and the greater Chicagoland area, all of which emphasize ongoing education and industry excellence to help us deliver the highest level of service.
careers
life at Zonatherm
Join Zonatherm and represent the future of power and thermal management. As the exclusive Vertiv and Generac Industrial Energy representative for Chicago and Northwest Indiana, we deliver cutting‑edge solutions to mission‑critical environments—and offer a place where your expertise and growth truly matter.
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.