Automatic Water Level Valve Designed for hanging air conditioners, this dust screen effectively prevents dust accumulation that can reduce your unit's performance and efficiency, keeping your indoor air cleaner and your system running smoothly. Easy Installation Quick, tool setup. Simply attach this filter accessory to your air conditioner's indoor unit air outlet to immediately improve cleanliness and maintain airflow. Long Lasting Material Constructed from sturdy plastic materials, this antidust filter provides reliable protection for your air conditioning system. Includes 2 pieces to insure continuous coverage between maintenance cycles. Multiple Style Options Available in 4 different designs to suit various air conditioner models and preferences, allowing you to choose the match for your specific heating and cooling system requirements. Use scenarios Use in rooms with hanging air conditioners in dusty environments (such as near construction areas, workshops, or dust spaces) to reduce dust ingress and keep the unit running efficiently. Ideal for rentals or shared spaces where quick, tool installation helps tenants or staff maintain cleaner indoor air without professional service visits. Use between professional maintenance cycles to ensure continuous filtration coverage with the included 2piece set.