Product review (4 stars): Required for use without external venting
Make sure you order this part if you will NOT use an external vent. This allows the air to be diverted and recirculated inside the home. The vent hood does not include this. I gave it 4 stars as it appears to be well built and easy to install. You never see this unit once the installation is completed. A reminder, if you are going to install the vent as a recirculation unit, make sure you order the carbon filters for your model vent hood.