Consider the relative importance of 10 birds at one extreme temperature out of a flock of 30,000 hens versus 10 percent of the flock or 3,000 at that temperature. Our goal is to minimize these micro-climate differences as much as possible so that when we set the average temperature to say 80oF, nearly all the birds are in that environment. Factors Affecting Average House Temperature Housing design will effect the average house temperature and temperature uniformity. Average temperature is affected by air flow, outside temperature and humidity, and the cooling efficiency of the pad system used. Regular cleaning of the pads and maintenance of the water distribution system is important in maintaining cooling efficiency of the cooling system.
Air flow is affected by static pressure difference between the inside and the outside of the house.
When airflow and inlet or outlet area are properly balanced the ventilation system will operate at optimum efficiency. Fan capacity may be reduced if fan blades and louvers are dirty or if fan belts are not properly adjusted. Major factors affecting temperature uniformity are the distance which air travels between the inlet and the exhaust and the amount of heat added to the air by the birds. Longer distances for airflow and greater numbers of birds producing heat usually result in larger temperature variations. Air speed through the inlets is governed by the static pressure difference between the inside and outside of the house.