4 Ducted Range Hood Venting Options - Comprehensive …
When installing your duct, include at least 18″ of straight run before adding an elbow. Make sure there is at least 24″ of straight duct between each elbow. 3. Install your ductwork in the shortest unobstructed path to the outside of your home. When possible, orient your ductwork so that you use the shortest run possible with the fewest elbows.