For a whole house fan you need to have a huge opening, meaning at least one of the big glass sliders. If you don't then you'll have stuff flying about. Unfortunately it ain't practical to have a 3ft*6ft filter tacked to the screen door even if you managed to find one ;-)
I think this whole technology is rather stone-age. Same with swamp coolers. All you can buy is those big and ugly boxes. Nobody makes a flat one with a nice cartridge filter. Progress in that domain seems to be as sluggish as it is with pellet stoves.