Powered ventilation systems for animal and poultry buildings have three main components - fans, air inlets and controls. Plan 9700 deals with fan ventilation principles and Plan 9705 deals with fans. This plan discusses air inlets. In a relatively airtight building, the design, location and adjustment of air inlets can almost completely control the distribution and mixing of the air, whereas the exhaust fans have only a minor and very local effect.
Fresh Air Inlets Leaflet (Metric
and Imperial)
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