Whirlpool Range Wall Hood Recirculation Kit (W11430939)This Range Wall Hood Recirculation Kit traps grease from the exhaust air of your oven to prevent it from entering the blower and vent, potentially causing build up and damage. If your current filter is no longer functioning properly, replacing this filter may alleviate the issue. This accessory can be used across several brands; check to see if your model number is compatible. Installing this part filter will require basic hand tools, some disassembly