Ventilation:Ventilation is an important aspect of animal housing,particulary closed housing.Poor ventilation can be detrimental to animal health and performance.Harmful gasses and dust can cause respiratory problems,while temperature extremes can reduce animal and human productivity.The purpose of ventilation is to provide the desired amount of fresh air,without drafts,to all,parts of the shelter,maintain temperatures within desired limits,maintain relative humidity within desired limits,maintain ammonia levels below specified levels.Ventilation can be natural or mechanical.Natural ventilation systems move air through adjustable and fixed openings,such as vents,windows,doors.Mechanical ventilation systems use fans,controls air inlets/outlets.
By: Susan Schoenian,University of Maryland