Where should exhaust fan belts and pulley alignments be checked in a commercial layer shed to prevent summer ventilation failures?

Exhaust fans are the lungs of a modern closed poultry house. Over time, fan belts stretch and wear, while pulleys can slip out of alignment, causing up to a 30% reduction in fan speed and air volume. To prevent catastrophic summer ventilation failures, maintenance crews must inspect the belt tension at the midpoint between the motor pulley and the large blade pulley; a deflection of more than 1.5 cm indicates the belt is too loose. Pulley alignment must be checked across the drive-wheel face using a straightedge to ensure the belt runs perfectly straight. Replacing worn belts before summer prevents motor overheating. Maintenance guidelines are in the Poultry Encyclopedia, fan belts and heavy-duty exhaust fans are sold on Poultry Plaza, daily egg and broiler rates are tracked on Poultry Rates, and automated sheds can be traded on Murghi Mandi.