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Author: Allison Bailes, III, PhD

Allison A. Bailes III, PhD of Decatur, Georgia, is the founder and owner of Energy Vanguard in Decatur, GA, and the author of the Energy Vanguard Blog. Also, check out his in-depth course, Mastering Building Science at Heatspring Learning Institute, and follow him on Twitter at @EnergyVanguard

An Air and Moisture Mystery in a Trendy Restaurant

I’ve got the curse, you know. I can’t walk into a building and not check out what’s going on with […]

Case Closed: Ducts Don’t Belong in Unconditioned Attics

About the worst place you can install a duct is up against the roof deck. Dave Roberts, a senior engineer […]

How Bad Is Compressed Fiberglass Insulation Really?

I’ve been guilty of perpetuating a myth. Not long ago I wrote an article in which I said, when installing […]

Calculating Friction Rate – It’s Not a Constant

Friction rate is a pretty simple topic. It’s just a straightforward calculation that gives us the design friction rate from […]

The New Code Requirements for Buried Ducts

Two articles ago, I wrote about what can happen when you bury ducts in attic insulation. The Home Innovations Research […]

The Home Performance Forum Has Launched!

The Internet age has made it easy to find information. Occasionally you can find some that’s even true. That’s where […]

Is It OK to Bury Ducts in Attic Insulation?

Water vapor from the air condenses on air conditioning ducts in humid climates. It’s as normal as poorly insulated bonus […]

Is It OK to Ventilate a Home with Attic Air?

I’ve seen some crazy things done to homes. It’s usually someone’s attempt to make things better. Sometimes that someone is […]

A Little History of MAD AIR

A lot of discoveries and research work over the past four decades have led to our current understanding of air […]

Do Humidifiers Cause Poor Indoor Air Quality?

IE3’s Building Science Expert, Allison Bailes, explains how to make sure your house has the right humidity.

Should You Remove Attic Floor Insulation in a Spray Foam Attic?

IE3 Building Science Expert, Allison Bailes looks at what insulation you should remove in spray foam attics.

Manual J Load Calculations vs. Rules of Thumb

We do a lot of heating and air conditioning system design at Energy Vanguard. Alexander Bell, who goes by Andy, […]

The Importance of Interstitial Cavities

Alison Bailes explains interstitial cavities.

5 Types of R-Value

Allison Bailes explains R-values.

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