About hvac system cleaning
WG means Drinking water Gauge. WG is part of the measurement unit for the stress of fan and pump. IN.WG which stands for inch h2o gauge would be the Imperial unit for strain. For example, ducts are Typically designed with 0.one in.wg of strain decline for every one hundred ft of duct duration.MFD means Motorized Fire Damper. MFD is usually a sort o