hvac system installation - An Overview
WG stands for H2o Gauge. WG is a component in the measurement device with the pressure of lover and pump. IN.WG which means inch drinking water gauge would be the Imperial device for pressure. As an example, ducts are Generally designed with 0.one in.wg of force loss for each one hundred ft of duct length.MFD means Motorized Fire Damper. MFD is a v