จัดส่งฟรี! เมื่อสั่งซื้อเครื่องกรองอากาศทุกรุ่น Adjustability: We Only picked air purifiers with at the least a few adjustable velocity stages. Air purifiers might be loud at their maximum speed — owning lower, quieter velocity possibilities, especially in bedrooms, is critical, depending on particular practical experience. CADR (thoroughly clean air supply ranking) is really waiting for link from Social Network Posts (7)