Sagging flex duct is bad for air flow. We all know it. We all talk about it. It turns out there’s research data to prove it, too. Texas A&M did a study a few years ago to look at the pressure drop that occurs for different levels of compression. If you’re not familiar with this study, the results may astound you.
The Science of Air Flow in Flex Duct
A Texas A&M study shows how much of a hit you take when you let flex duct sag