positioned right over my HO (125 A) Alt, it does an excellent job of keeping my Alt cooler, and we spend all our time in the Tropics. I have my Blower relayed into the engine key switch, so when the engine gets turned on, the blower comes on automatically (I also have an on/off toggle in-line for the Blower should I care to turn it off for any reason while engine is running). Nice idea, your hose more rigid than mine which I think came from HomeDepot and is 4", I like yours, maybe a McMaster-Carr find ... cheers, John