I don't have a B&B, but I do have it installed in my car. If it's hot air outside, it's hot air that is dumping in to the footbox. You can buy all the parts yourself, if you really want to do it, from a marine/boat store. Basically the same fans/ducting used in getting fuel vapors from an enclosed boat engine compartment. Does it help? PM me so I don't say anything in a public forum if you want to know. My .02 worth. See this link for installation - This is from the CD he sends with the kit as well as my install -
http://s137.photobucket.com/albums/q...Footbox%20Kit/