Don Gillis

Don Gillis

Company name: The Chemours Company
Position: Technical Trainer

Don Gillis is a technical trainer at Chemours. Prior to his work with Chemours, he was a training specialist and HVACR instructor for Copeland. He has over 30 years of experience in the industry, having been an installer, sales and service manager, and service technician. Don has written several tech tips for HVAC School and is a familiar face at the HVACR Training Symposium.

Tech Tips written:

Vacuum: Moisture vs. System Leak
This tech tip was written by Don Gillis with Chemours. Thanks, Don! Evacuation helps remove contaminants, like moisture and non-condensable gases, from HVAC/R systems, especially ones that are put into service for the first time or put back into service after a repair. Even though pulling a deep vacuum has always been a best practice, […]
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How Similar Are A2Ls to R-410A?
This tech tip was written by Don Gillis with Chemours. Thanks, Don! You’ve probably heard it way too many times now: A2Ls are coming.  While we’ve heard a lot about what “A2L” really means and the R-410A phasedown timeline, there isn’t a lot of public information about what to expect on the service side. I’ve […]
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R-410A Phase-Down Update
This tech tip is an overview of the livestream by the same name, featuring HVAC School contributors Matt Bruner, Roman Baugh, and Adam Mufich, as well as special guests Don Gillis, Dr. Chuck Allgood, and Jason Obrzut. You can watch the full livestream HERE. These gents also gave the “Flammable Refrigerant Update” at the 2023 […]
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Event speaker:

What You Need to Know About Future A2Ls
NOTE: If you cannot view the recording, the video may still be processing. The maximum wait time is 24 hours. We apologize for the delay and appreciate your patience.
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Video guest:

Podcast guest:

A2L Update With Chemours Live from AHR
 Don Gillis and Dr. Chuck Allgood from Chemours join the show to discuss their new easy as “1,2,3” branding around the A2L refrigerants R454A, R454B, and R454C. They explain that A2Ls are not actually flammable like hydrocarbons; they are just mildly combustible with much lower burning velocity and energy than propane or butane. The […]
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Intro to CO2 w/ Don Gillis
Don Gillis with Emerson joins us on the podcast to teach us the basics of CO2 as a refrigerant. He explains how it works and its applications. Carbon dioxide is a colorless, odorless gas that is becoming an important refrigerant for commercial refrigeration (R-744). It is desirable because it has a low critical point and […]
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