5 Simple Techniques For hvac system parts
WG means H2o Gauge. WG is an element from the measurement unit to the pressure of admirer and pump. IN.WG which means inch drinking water gauge will be the Imperial device for tension. For instance, ducts are Typically designed with 0.1 in.wg of force reduction per 100 ft of duct duration.BDD stands for Backdraft Damper. BDD is used to make certain