Farms need ventilation systems to regulate the humidity and heat produced by the pigs, as well as the air pollution produced by manure,feed and the pigs themselves.
Many farms opt for natural ventilation, which places strict demands on the local climate and architecture. With the increase of automation in pig farms, mechanical ventilation began to be widely used.
The micro ambient temperature, that is the temperature surrounding each pig, can be controlled effectively by means of ventilation. Pigsthat are herded together in a building create heat. The heat may beapplied to good effect during cold conditions, but during warm conditions, it must be removed by means of effective ventilation.
Humidity plays an important part in the micro climate conditions inside piggeries. The ideal is to keep pigs in a relative humidity range of between 45% and 75%. Relative humidity values of more than 80% and less than 40% should be avoided. This may be brought about randomly by means of natural ventilation, or by means of controlled ventilation and proper management.
