Circulation Fans Home Curtain Systems Panel Systems Fans Calf Barns Controllers Heat Exchanging and Manure Drying Circulation Fans On the very hot summer days, natural ventilation alone is not sufficient to keep livestock cool. Those are the days where it is very nice to have circulation fans to help move extra air for your livestock. features Up to 52” diameter Up to 28,000 CFM 1 hp motor Option of belt driven or direct drive Versatile mounting options Low maintenance