Before selecting duct materials, it helps to understand how air flows from your heating/cooling unit through the duct network. Most systems use either a hot air furnace or an air conditioner ...

As air moves from a supply plenum or main duct into a takeoff it changes direction. Airflow has a hard time making turns at high rates of speed, just as we would driving down the interstate. When we ...

There are certain principles of air movement that, once understood, allow you to direct airflow as needed in an HVAC system. Understanding these principles will allow you to solve comfort problems ...

The National Electrical Manufacturers Association has published NEMA PRP 2-2014 Guidelines for Solvent-Cementing Joints for PVC Rigid Nonmetallic Conduit, Duct, and Fittings. This document presents ...