Flue gases, auto exhaust, and other harmful ... interior door acts like a manual damper in a duct system. If you have a central return grille installation, door position affects how much air moves ...

Manual D Ductsize (MDD) is a fast and simple program designed for sizing and analyzing HVAC duct systems based on the Air Conditioning Contractors of America’s (ACCA’s) Manual D procedures. It ...

For restaurant owners and commercial facility operators, the kitchen is the heart of the operation. Yet, one of its most critical components — the hood and duct system — is often overlooked until ...