hvac system installation - An Overview
GRD means Grille, Register and Diffuser. GRD indicates a element is either a grille, a sign up or maybe a diffuser. It's really a generic time period used to explain anything at all that’s offer/return and exhaust/intake air.EAD stands for Exhaust Air Duct. EAD is commonly found in duct format drawings, specifically for the air flow system. A duc