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Ventilation in a poultry house supplies fresh air that is essential to sustain life. It also helps reduce the extremes of temperature, humidity and air contamination to tolerable limits for confined chickens.
Improved ventilation systems have also made possible the high density populations of livestock and poultry in confinement, thus reducing the building cost per unit housed. This is economically important since it reduces production and labour costs.
Ventilation air removes excess heat, moisture, dust and odours from the building and, at the same time, dilutes airborne disease organisms. Properly designed winter systems also conserve energy by utilising heat generated by the birds.
Ventilation Systems
Ventilation Systems are generally divided into two types: (1) Natural Air Flow System (2) Mechanical Air Movement.
Because of varying ventilation requirements, the two distinctly different systems are sometimes combined in an attempt to provide comfort to the chickens during varying climatic conditions at minimum cost.
Poultry House The Air Enter and Out
Negative (Exhaust) System: In the negative pressure system, fans are arranged to expel air from the building.
Positive Pressure (Ventilation)System: A positive pressure system uses fans to push air into the building and create a positive pressure. The pressure difference causes the air to move – in this case out through louvres or other outlets.

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