About hvac system components
WG means H2o Gauge. WG is part on the measurement device to the tension of enthusiast and pump. IN.WG which means inch h2o gauge will be the Imperial unit for tension. By way of example, ducts are Usually designed with 0.1 in.wg of force decline per 100 ft of duct size.BC means Branch Circuit. BC or BC controller is referring for the controller use