What Does hvac system installation Mean?
GRD means Grille, Sign-up and Diffuser. GRD implies a part is either a grille, a sign-up or a diffuser. It is just a generic time period used to explain just about anything that’s supply/return and exhaust/ingestion air.MFD stands for Motorized Hearth Damper. MFD is usually a type of damper that is the two motorized and proof against hearth. It u