hvac system installation - An Overview
GRD means Grille, Sign-up and Diffuser. GRD suggests a ingredient is either a grille, a sign-up or perhaps a diffuser. It's really a generic phrase used to explain everything that’s source/return and exhaust/ingestion air.CRU means Condensate Restoration Device. CRU is actually a tank or a system that recovers the condensate water produced by the