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JD Kelly

Company: A/C Direct & StudentofHVAC

Position: Owner

JD Kelly (also known as StudentofHVAC) is a licensed HVAC contractor and is the owner-operator of A/C Direct, an Alabama-based residential air-conditioning service business. JD is also the content creator for the StudentofHVAC social media pages and is a passionate enthusiast of HVAC training and education.

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5th Annual HVAC/R Training Symposium Read more

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Combustion and Confined Spaces

All fuel-burning appliances require oxygen to burn. They require sufficient oxygen to burn cleanly and safely, without soot and CO (carbon monoxide). I see many open combustion furnaces jammed into tight closets and mechanical rooms with little thought or planning regarding combustion air. I live and work in Florida, where most of our fuel-burning appliances […]

Clocking a Gas Meter (It’s Not That Hard)

I’ve heard a lot about clocking gas meters over the years, and honestly, in Florida, there isn’t too much call for heat. There are even fewer furnaces. I was pleasantly surprised when I found out how easy it actually is to clock the gas meter. Here is how you do it, step by step: Make […]

Double Lugging, A Common Mistake

Connecting more than one wire on or under a single lug or connection point is called “double lugging,” and it is ONLY allowed in line voltage wiring under one condition, according to NEC 110.14: If the terminal, lug, or connector is specifically rated for more than one wire In the case of a conductor splice, […]

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Testimonials from the 6th Annual HVAC/R Training Symposium Part 2

Testimonials from the 6th Annual HVAC/R Training Symposium

UEI’s Latest HVAC Testing Tools | HVAC School at AHR 2025

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All About ESCO with Renee Tomlinson and MeasureQuick’s Latest Features with Jim Bergmann

In this short episode, the HVAC School team members talk with Jim Bergmann (measureQuick) and Renee Tomlinson (ESCO) about the latest and greatest that they brought to their booths at the 7th Annual HVACR Training Symposium. First, JD Kelly spoke with Renee about ESCO Institute’s educational offerings. ESCO offers a mix of books and […]

Is HVAC School Worth It?

In this comprehensive discussion, Bryan sits down with Brad Cooper, an experienced HVAC instructor from Arkansas, and JD Kelly, a trade school graduate, to tackle one of the most pressing questions in the HVAC industry: Is trade school worth it? Rather than offering a simple yes or no answer, the trio dives deep into […]

Superheat Talk w/ JD Kelly

In this episode of the HVAC School podcast, host Bryan discusses superheat with guest JD, who recently co-authored an article on the topic with Ty Branaman. The conversation explores the often misunderstood concept of superheat, its importance in HVAC diagnostics, and common misconceptions technicians have when measuring and interpreting it. Bryan begins by sharing […]

JD Kelly

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