hvac system types for Dummies
WG means H2o Gauge. WG is part of the measurement device for your pressure of supporter and pump. IN.WG which means inch drinking water gauge is the Imperial unit for stress. For instance, ducts are Generally designed with 0.one in.wg of stress decline for every a hundred ft of duct duration.MFD means Motorized Fireplace Damper. MFD is actually a s