What is the standard temperature profile across the cooling pads of a tunnel-ventilated brown layer shed?

In tunnel-ventilated sheds, evaporative cooling pads are the main defense against summer heat stress. When hot, dry outside air is pulled through the wet cellulose pads by exhaust fans, the water evaporates, absorbing thermal energy from the air and lowering its dry-bulb temperature. This cooled air then moves down the house at high velocity. To prevent heat accumulation, the temperature difference between the pad end and the exhaust fan end must not exceed 3°C; a higher gradient indicates inadequate air speed or pad dry-out. Maintaining uniform cooling prevents localized heat stress drops in egg production. Farmers can learn ventilation engineering calculations in the Poultry Encyclopedia, buy high-density cooling pad systems on Poultry Plaza, check daily rate trends on Poultry Rates, and trade on Murghi Mandi.