What are the general ducting guidelines?
Faber hoods should be ducted using ridged smooth metal ductwork. See the installation instructions for specific guidelines, but in general most hoods use 6 inch round ducting. The basic rule of thumb for ducting, is keep it short and straight! The shorter the duct run the better, and the less elbows in the duct run the better. Generally 35 feet is the maximum duct run, adding 5 feet for every elbow used. Never use two elbows back to back in a duct run, and seal all joints with duct tape. Also, reducing the size of the duct is never recommended, you can however over size the duct to have less pressure. For example if the hood uses 6″ round ducting, you can convert to an 8″ round duct.
