The Thor Kitchen ARC3001T Recirculating Kit converts the ARH30T 30-Inch T-Shape Range Hood from a ducted to a ductless setup — giving you more flexibility in how and where you install your hood. Instead of routing air outside through ductwork, the kit recirculates and filters air back into your kitchen, making it an ideal solution for spaces where external ducting isn't an option or when you simply want a cleaner, easier installation.