Allison A. Bailes III, PhD Archives

Allison A. Bailes III, PhD

Company name: Energy Vanguard, LLC

Position: Founder and President

Dr. Allison Bailes is a building science expert who has spoken at many conferences, written several informative articles on The Energy Vanguard Blog, and published a book, A House Needs to Breathe… Or Does It? He has received a formal education in physics and has taught that subject at the high school and college levels. Nowadays, he applies that subject knowledge to his personal areas of interest: high-performance and green buildings.

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Solving Delta T

Delta T is the difference in temperature between two points of the same medium. It is commonly used by scientists and engineers to analyze the amount of heat transfer in a system. In general HVAC terms, it is the measurable change in temperature between an air input and air output. However, it could also be […]

Don’t Fall for Unsafe Practices: Heights in HVAC

DISCLAIMER: HVAC School is NOT an official OSHA safety training resource! Although we provide safety tips in good faith, our website is not a substitute for safety training from an authorized OSHA training source. Many things may deter people from working in the HVAC industry. Perhaps surprisingly, exposure to heights could be the deal-breaker. (Not […]

Why is 3/8″ Liquid Line So Common? – Liquid Line Sizing

You may have noticed that 3/8″ liquid lines are generally the norm in equipment 5 tons and under. We went to a job where the system had a 1/2″ liquid line, and it got me thinking about the ramifications of going larger or smaller on the liquid line. Liquid Line Basics The liquid line should […]

A Layered Approach to IAQ

Is Undersizing Really a Problem?

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A Layered Approach to Indoor Air Quality

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Dr. Allison Bailes Discusses His New Book

Do Houses Need to Breathe? w/ Allison Bailes

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Proper Design For Ductless and Ducted HVAC Systems

In this podcast episode, Bryan, Chad, John, and Allison discuss proper design for ductless and ducted HVAC systems, especially mini-splits. They also discuss potential future improvements to equipment and duct designs. Mini-splits are smaller than traditional HVAC units, so they make zoning a bit easier. However, load calculation plays a huge role in equipment selection […]

Friction Rate and Duct Design w/ Dr. Bailes (Podcast)

This episode is very exciting to me because we get to have Dr. Allison Bailes on the show. Today, he shares his knowledge about friction rate and duct design. Allison got his start teaching college-level physics before getting into the building design industry. If you have a forced-air system that blows heated or cooled air […]