Ductless Downdraft Vent KitThis 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