Facts About hvac system working principle Revealed
WG stands for H2o Gauge. WG is an element of the measurement unit for your force of lover and pump. IN.WG which means inch h2o gauge is the Imperial unit for pressure. By way of example, ducts are Commonly designed with 0.1 in.wg of stress decline for each 100 ft of duct duration.BDD stands for Backdraft Damper. BDD is used to be sure air flows in