Karl Zellmer

About Karl Zellmer

Emerson Commercial & Residential Solutions, Contractor Relations Karl has been serving the HVAC industry for the past 35 years, currently serving as Emerson’s vice president of air conditioning sales and technical support for OEMs and the aftermarket. Whether it is selecting a contractor, performing simple maintenance, understanding the regulations and efficiency ratings, or providing insight to what types of equipment are available, Karl offers guidance on these and other HVAC topics. For contractors and other HVAC professionals, he dives deeper into the technology and regulations, and what that can mean for their business and future plans.

Ask the Manufacturer – Episode 8 In HVAC On Air Podcast Series


In this episode, Vince Gillette, Tim Cropp and Bobby Ring turn the tables and ask Karl Zellmer about how recent trends and regulations have impacted Emerson’s business.

Host: Karl Zellmer
Guests: Vince Gillette, President of Gillette Air Conditioning Company, Tim Cropp President of Cropp Metcalfe Services & Bobby Ring, President/CEO, Meyer & Depew Company

HVAC Regulatory Issues – Episode 5 In HVAC On Air Podcast Series

Karl Zellmer discusses recent government regulations for both commercial and residential systems with Vince Gillette of Gillette Air Conditioning Company and Tim Cropp of Cropp Metcalfe Services.

Host: Karl Zellmer
Guests: Vince Gillette,

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Advice from the Field: Contractor Q&A

We asked two licensed contractors to share some advice and best practices on things homeowners can do to prepare for a contractor visit, maintain their system, and have an overall positive experience with their air conditioning and heating system.

The contractors contributing to this article are Ray Isaac,

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