What is a ducting kit and how do I fit one? - DIY Kitchens - Advice
Amazon.com: FIREGAS Black Range Hood 30 inch, Ducted/Ductless Range Hood Wall Mount Kitchen Vent Hood with 3 Speed Exhaust Fan, Push Button, LED Light, Stainless Steel Stove Hoods, Charcoal Filter Included :
Should my kitchen extractor fan duct look like this? : r/DIYUK
How to Choose the Right Kitchen Vent Hood - This Old House