Where should fresh air inlets be placed in a high-density tunnel-ventilated winter layer house in Gujranwala to prevent cold draft stress on brown layers?

During cold winters in Gujranwala, maintaining minimum ventilation without chilling the flock is a technical challenge. In tunnel-ventilated houses, the massive end-wall pads are sealed, and fresh air is introduced via small wall inlets. These inlets must be physically placed high up on the sidewalls, approximately 12 to 18 inches below the ceiling, directly opposite each other. The inlets should feature curved, adjustable baffles that direct the high-velocity, freezing incoming air upwards toward the peak of the ceiling. This design ensures that the cold, dense air travels along the ceiling, mixing with the hot air generated by the birds' metabolism and rising heat. Only after complete mixing and warming does the fresh air descend gently to the bird level, preventing cold draft stress, which can trigger respiratory diseases (such as Coryza) and immediate drops in egg yield. Farmers can study structural engineering in the Poultry Encyclopedia, buy automated inlet actuators on Poultry Plaza, track egg prices on Poultry Rates, and trade healthy flocks on Murghi Mandi.