rainproof louver negative pressure exhaust fan

Steel Casing Square Ventilation Fan Rainproof External Louver Negative Pressure Exhaust Fan

FAB Series Standard Square Ventilation Fan * The FAB series square ventilation fan features an energy-saving, low-noise impeller design and a high-strength steel casing with anti-rust spray treatment. * The fan is equipped with external louvers for excellent rainproof performance, making it suitable ...