I grabbed a squirrel-cage blower that was lying around at work. I believe it came from a Jenn-Air downdraft range and has never been used. It's @ 6" diameter. I went to plug it in to see how quiet it is and found that it has an odd plug. Instead of the standard 2 flat blades and a round, one of the flat ones is round. The motor has no markings on it anywhere. I'm tempted to switch the plug and try it. Your thoughts ?