While recently eating dinner with my colleague Paul Wieboldt, we started talking about the common defects found in many duct systems today. As we listed the various duct system flaws typically ...

The Unico System has revolutionized the connection system for its flexible supply tubing, reducing the steps and time involved in the installation of its products. The longtime leader in small-duct ...

Main heating supply ducts need to get smaller the farther away they are from the furnace. Note how the large duct on the left narrows down. (Tim Carter) Analysis by Tim Carter Q: Tim, I’ve got a ...