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Designing Supplemental Positive Pressure Ventilation Systems
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While natural ventilation and negative pressure mechanical ventilation are the most widely used systems for nursery and growing calf barns, both have problems that can be minimized with supplemental positive pressure tube systems. In this workshop, Dr. Ken Nordlund will present on de-signing systems to deliver appropriate volumes of fresh air to calves without creating drafts. Problems with fluttering tubes, uneven distribution of air along the tube, and failure to inflate will be reviewed, along with practical ideas for tube location and construction materials. Participants will receive and learn to use the Dairyland Initiative's Supplemental Positive Pressure Ventilation Tube Calculator to create specifications for example barns and troubleshoot existing systems.

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