I've been thinking about this for a while and I think I have come up with an acceptable solution. I work with metal so I figured go with what you know. A Stainless steel grille with 3x5 slots cut into it would have a hem top and bottom(see lower right of sketch)this will allow a piece perforated stainless to slide behind. The perforated stainless will have matching 3x5 slots cut into it. a door lock actuator will move the perforated sheet sideways either exposing the slots (for max cooling) or covering them) for max efficiency. thoughts, critiques, and opinions?
Philip1 
Threaded Mode
