Disclosed is a system and method for control of air flow in an enclosure. A system discloses: a first element located on a first surface of the equipment enclosure having: first and second reels located along opposing edges of the first element; and a first air flow control element located between first and second reels and having a first portion and a second portion, said first portion being located on an edge of the first element adjoining the first reel, said second portion being located on an edge of the first element adjoining the second reel, each having apertures located therein of a number or cross sectional area different from the other portions, movement of the first air flow control element from a first reel to a second reel by rotation of the reels causing the first portion or second portion to be positioned between the first and second reels.