Don Gillis Archives - HVAC School

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.

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Two Ways to Prevent Freezing in 90%+ Furnace Condensate Lines

This tech tip came from an email sent by Adam Blunkall, a Tennessee-based HVAC technician. He shared some tips to help overcome this issue in his market, and we appreciate his insight. Thanks, Adam! If we’re draining our 90% furnaces (or any condensing heating system) outside the structure in a similar fashion as we would […]

Decoding Measurement Lingo

Troubleshooting and commissioning are entirely data-dependent processes. How can you know that a system is undercharged unless you measure the superheat and subcooling? How can you know how much static pressure a blower motor has to overcome? In both cases, we use tools to help us determine the next steps. However, using the right tools […]

History of Thermometry and the Invention of Thermometers

So, what is thermometry anyway? Thermometry is the scientific study of measuring temperature and has roots that date back to as early as 220 BC. During this time, Philo of Byzantium began to study the effects that temperature had on air. Specifically, he observed expansion and contraction caused by temperature change. He did this using […]

What You Need to Know About Future A2Ls

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Flammable Refrigerant Update

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What You Need to Know About Feature A2Ls with Don Gillis & Christian Pyles

Easy As ABC with Don Gillis at the Chemours Booth

Flammable Refrigerant Update

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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 […]

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 […]