Date
Inquiry
EQ 6.2 (a) requires "Size the opening to 1 square inch per cfm of supply (this area may include free area undercut below door)", and allows various strategies including returns, transfer grilles, or jump ducts. If a project has a return that is suited to the distribution system, but is smaller than 1 square inch per CFM, can it still earn the point?
Ruling
If a project installs returns that are ducted directly to the AHU in every room, and these returns are properly sized as per Manual D, then the intent of EQ 6.2 (a) has been met and the project may be awarded credit. This is true even if the size of the return is less than 1 square inch per CFM.
Internationally Applicable
Off
Campus Applicable
Off