The Whirlpool WP707929 Grease Filter captures grease particles from cooking vapors to keep the range hood’s ventilation system cleaner. Installed in the designated filter slot, it allows air to pass through while trapping grease before it accumulates on internal surfaces. This supports cleaner ventilation components and reduces grease buildup during everyday cooking. A clogged, damaged, or missing filter may reduce airflow and allow more grease to collect inside the range hood.