Here's another prototype I designed: A hand dryer that uses a 120mm fan to provide a flow of air for drying hands. It's best used with a 120mm fan that has a high CFM rating (like these San Ace fans I have although you could get away with less: http://products.sanyodenki.com/en/contents/hp0071/list.php?CNo=71&ProCon=1266) https://www.youtube.com/watch?v=hlABUHapZsU&feature=youtu.beYou will need four long screws to assemble the whole unit (they go through the bottom, through the fan into the top housing). The bottom housing is designed to fit a 120x120x38mm style fan. It will need to be resized for fans with a smaller depth. It can be hung on a wall or operated on a solid surface.