How hvac system diagram can Save You Time, Stress, and Money.
GRD stands for Grille, Register and Diffuser. GRD suggests a ingredient is either a grille, a register or possibly a diffuser. It's really a generic term utilized to describe just about anything that’s provide/return and exhaust/consumption air.IU means Induction Unit. IU can be a secondary air-con unit that is frequently Situated near the target