The Greatest Guide To hvac system working principle
WG stands for H2o Gauge. WG is part with the measurement device with the pressure of supporter and pump. IN.WG which means inch drinking water gauge would be the Imperial device for tension. As an example, ducts are Generally designed with 0.1 in.wg of strain loss for each a hundred ft of duct length.BDD stands for Backdraft Damper. BDD is applied