This is a Doran Darkroom fan with a no-light vent. It is designed to fit in the wall and can be wired directly into a house circuit. total depth is 4" so you can put a vent to cover the back side or you can use 4" vent pipe to duct it out of the house. I'm including 2 12x12 no-light vents to use on the other side of your darkroom for intake air. The fan has very little use, it has drywall dust from removal but is near new otherwise. I am downsizing and trying to sell off gear i am no longer using. Payment via Paypal only. Payment is due within 3 days of the close of the auction. USA address only for shipping. Thanks for looking and please check out my other auctions.