This Ductless Downdraft Vent Kit Is A Decorative Unit That Can Be Used When Venting To The Outside Is Either Not Possible Or Not Desirable In The Kitchen. The Kit Contains A Filter Housing That Attaches To The Blower Under The Unit; The Filter Cleans The Air Before It Re-Enters The Home. This Is An Accessory That Can Be Used With Several Brands; Check To See If Your Cooktop'S Model Number Is Compatible. Size: 31" L X 20" W X 7-1/2" H. Installing This Accessory Will Require Basic Hand Tools And Novice Repair Experience. Remember To Turn Off The Appropriate Circuit Breaker Before Installing This Part. Helpful Tip: For Optimum Performance Of Your Vent, Change The Filter (Item W10800530) Every 6 Months Or When A Loss Of Airflow Can Be Detected.