What’s the Difference Between Energy and Heat Recovery Ventilators?

On the Mastering Building Science discussion board, Allison A. Bailes III, PhD asks students: What is the difference between an ERV and an HRV?
Allison A. Bailes III, PhD: In the homework, I asked, “What is the difference between an energy recovery ventilator (ERV) and a heat recovery ventilator (HRV)?” Let’s address that here and extend […]

FREE Tool: Series Parallel R-Value Calculator

DOWNLOAD Dr. Allison Bailes’s FREE Series Parallel R-Value Calculator
Calculate the average R-value of an assembly
Wouldn’t it be nice if you could push a button and see how much of a hit the R-value of a building assembly takes when you change the amount of exterior insulation, move the studs closer together, or leave an attic […]