This range hood recirculation kit can be used when venting to the outside of the home is either not possible or not desirable. Vent smoke and odors with a powerful 400 CFM motor class range hood. This works with 36″ wall mount range hoods, please check your model number to ensure compatibility. 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 accessory.