Roof air inlet windowPlastic material, corrosion resistance, long service life. Installed on the roof of livestock and poultry house, it can be adjusted automatically and used for ventilation of livestock and poultry house in winter. The air inlet can be disassembled and cleaned conveniently.Side wall intake windowInstalled in radial side wall, used for ventilation and ventilation in winter house, using high quality plastic material, anti-aging, long service life.