rainproof louver negative pressure exhaust fan

สแตนเลส Casing Square แฟนอากาศ กันฝน ภายนอก Louver ความดันลบ แฟนไอ้

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 ...