hvac system types for Dummies
GRD means Grille, Sign-up and Diffuser. GRD implies a element is both a grille, a sign up or possibly a diffuser. It's really a generic term applied to explain anything at all that’s source/return and exhaust/consumption air.EAD stands for Exhaust Air Duct. EAD is usually found in duct structure drawings, specifically for the air flow system. A d