hnp 50 butterfly cone fan

●suitable for ventilation of high-negative pressure birds coops with a negative pressure range of 0-100pa;

●the automatic tensioning device used can improve the transmission efficiency and reduce the maintenance frequency;

●the support structure is added to the back-end protective net, which enhances the strength of the protective net;

● the narrowed air duct is optional, which is suitable for a poultry house with compact gable wall space.

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