This Range Hood Wall Canopy Recirculation Kit can be used when venting to the outside is either not possible or not desirable. This recirculation kit with charcoal filters can be used to freshen air and recirculate it back into the kitchen. The kit includes (2) charcoal filters and (4) clips and is designed to be used with 30" Whirlpool® wall-mount range hood models WVI30330LS and WVI30336LS; check to see if your model number is compatible. Installing this accessory will require basic hand tools, some disassembly of the appliance and novice repair experience. You must unplug the appliance or shut off the house circuit breaker before installing this part.