Farm ventilation provides the fresh air that is essential for sustaining life. It also helps reduce extreme temperatures, humidity, and air pollution to tolerable limits for the animals housed.

Controlled climate control systems have made it possible to increase the density of confined livestock and poultry populations, thus reducing the cost of construction per housed unit and the excessive use of land for these purposes. This is economically important as it reduces production and labor costs.

The most used system to provide climatic well-being to animals is forced ventilation.