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Mark Zehnal

Mark Zehnal is director of technical services with the Florida Roofing and Sheet Metal Association. A version of this article originally appeared in the September 2014 issue of Roofing Florida magazine.

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ARTICLES

Proper installation key to metal roofing success

Mark Zehnal

June 22, 2015

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Although it’s been around for centuries, metal roofing has become increasingly popular in the last 20 years.

DOE Postpones HVAC Efficiency Standards

How Tariffs Will Impact HVAC Pricing

New Heat Pump Technologies Make Their Debut

New Year Ushers in Era of A2L Refrigerants

In Focus: Data Center Cooling Solutions

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Mark Zehnal

ARTICLES

Proper installation key to metal roofing success

The Domino Effect: Steel and Aluminum Tariffs' Impact on HVAC: An HVAC Minute Video Update - March 4, 2025

HVAC Q&A Episode 8: AI & HVAC Lead Management

Expert Tech Tips: Episode 17 – Troubleshooting Using Evaporative Pressure, Temperature, & Superheat

What Led to HVAC Manufacturer Sales Boom: An HVAC Minute Video Update - January 20, 2025

HVAC Q&A Episode 3: What Contractors Need To Know About RDS Field Installs

Finding the Right Trainers for Gen Z: An HVAC Minute Video Update - September 16, 2024

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