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-in L x 20-in W x 7-1/2-in 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. Special shipping and handling is required for this item.