Welcome to RS.Just a thought but I know it works and is very easy to do if you are a do it yourselfer.Radio shack sells a fan that can be used for computer,entertaiment centers,pretty much anything.It's very easy to install.It mounts flush and depending on which way u decide to mount it,it will push or pull the air.The one I used is about 4x4 inches square and 2 1/2 inches thick.All you need to do to wire it is to get a cord from anything.I used an old extension cord.So it was long enough to go from the hood to the plug.Cut the socket end off the cord and solder,or twist and wire nut the two wires to the two wires sticking out of the fan.....Plug it in and yr done.The hardest thing about this is cutting the hole for the fan to mount to.I used a hole saw that goes in a cordless drill.I think it was a three incher.I really hope this helps you or gives you an idea.The fan is so quiet u wont believe it.....Once again welcome and be safe today we need our fingers.......