Tunnel ventilation components include large exhaust fans along one end wall of the barn and large openings along the other end. Alternative inlet and fan locations are discussed as well. This guideline also addresses key considerations for planning and operating a tunnel ventilation system, including preparing the tunnel ventilation system for winter, when an alternative system should be used. It includes seventeen illustrations, a table of fan and inlet requirements for typical tie stall barns, and sample calculations. DPC approval indicates review by milk inspection agencies of DPC member states and the U.S. Food and Drug Administration.
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