I had the same thought of building a square box with fans like that......figured someone had already done it.......anyway, it's basically a massive non directional wind in there....he 'theoretically' has it going left-->right, top-->bottom, and front-->back, but basically that air just gets tossed around in there like nothing...........it might work better if he did something like....the front, right panel, and top were all intake, and then back, left panel and bottom were all exhaust...that way you MIGHT get a more uniform flow of air........chances are the air probably isn't moving that much....all the fans combined are causing a 'stalemate' of sorts.......anywho this is just my speculation, but it makes since if you try and visualize the air in your mind.