Too complicated and not worth the trouble as yardjunkie posted in another post about making a elaborate chiller when the wind blows its not worth the trouble. Easiest and cheapest thing to do is a straight through design. Easiest is usually the best and i have been using the same design for years now and it works like a charm and very easy. Cooler 3inch duct fittings on either end and screen so the ice doesnt fall out. Fill it up and your set. No need for all those bends angles and what not. and the ice doesnt melt on me after 4 hours so......But its your choice 