Originally Posted by
John Arnold
Seriously, though, what's the difference between having a return in a laundry room that gets all of its air from the kitchen, through a louvered door, and having a return in the kitchen?
John A.
Prohibited sources
IRC 2003 M1602.2 part 3 A room or space the volume of which is less than 25 percent of the entire volume served by such system.
4 - A closet,bathroom,toilet room ,kitchen,garage,--------
If the space is smaller than 25 percent of the entire volume and an equal amount of supply air is not present it is Prohibited.
If you try to use the permanent opening to archive the 25 percent requirement it can not come from a prohibited source. As that area is already prohibited from a source of return air.