Love, just simply love the Stirling Engine "Heat Wave" fan on my old VC Resolute. Get the box up to 450... it starts spinning. Anything above 500 the engine is pushing air 15 feet across the room and warming the whole house. I bought this one from an outfit in Alabama maybe, oh, 6 years ago. They're gone, kaput. I have been looking for another for a couple years. Cleaning out my junk mail box, I had an e-mail from gyroscope.com - they had stirling engine wood stove fans in stock! I hit the button immediately and paypal'd 'em. Hopefully I'll see it in in the next couple weeks. Direct link: http://www.gyroscope.com/d.asp?product=VULCANSTOVEFAN I figure if one fan is good, two should rock!