To fully understand how to install a high-velocity HVAC system, one must know what it is and what it does. Basically, it is a small duct, high-velocity airflow, heating and cooling system designed to ...

NEC cabling installation requirements are straightforward, but markings and new offerings may create confusion. You're not alone if markings and listings are making your plenum cabling selection a ...

With Cat. 5e or Cat. 6 cabling now being installed in most new construction projects, some changes in installation methods are in order for slab-on-grade floor boxes with communication outlets.

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 ...