Southern Tier Technologies

Zonatherm partners with Southern Tier Technologies to offer innovative solutions for clean, reliable power

Southern Tier Technologies surge protection device

Product Lines We Represent

Southern Tier Technologies Resources

Spec Sheets and Brochures

Find sales brochures, FAQ white papers about power factors, and technical specs for Southern Tier products.

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The Experts in Power Quality and Protection

Southern Tier provides products and services that include real-time monitoring and innovative technology to ensure the integrity of power systems.


Southern Tier’s rule for power quality has always been that an efficient, reliable operation starts with a clean sine wave.


Southern Tier offers a series of intelligently designed products that protect businesses’ most critical locations.


The Tier 500 Unit delivers the most efficient operating costs as well as the fastest corrective response in the industry.

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

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Ready to partner with Zonatherm for 100% reliability?

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