Does anyone have any experience with one of these or what are your thoughts on it?
No electricity needed,runs on heat
Up to 450 cfm,Industrial quality
http://www.aspensystems.com/self-powered-fans.html
http://www.youtube.com/watch?v=3s9I03aB3uw
No electricity needed,runs on heat
Up to 450 cfm,Industrial quality
http://www.aspensystems.com/self-powered-fans.html
http://www.youtube.com/watch?v=3s9I03aB3uw