5 Simple Statements About hvac system cleaning Explained
GRD stands for Grille, Sign-up and Diffuser. GRD suggests a part is possibly a grille, a sign-up or perhaps a diffuser. It is just a generic time period utilized to explain something that’s source/return and exhaust/consumption air.EAD means Exhaust Air Duct. EAD is usually found in duct structure drawings, specifically for the ventilation system