Range hoods are typically vented using a special duct work that runs through a roof and less often through an exterior wall of your house.
Vent range hood through wall or roof.
It is considered a little more expensive to vent your range hood through the roof than through the wall.
This is why you need to install the range hood vent properly or you call a roofing contractor.
The duct work is usually concealed within the walls and it is really important to make everything air and water tight.
A wall vent is the most common type of range hood vents and is ideal for most house based kitchen situations.
It is installed much like an exhaust fan and works by expelling the heat directly from the kitchen in a straight passageway.
This particular step will require a level of pinpoint accuracy from you because once there is a mistake the whole procedure goes.
This type is most effective in eliminating damp and stale air that accumulates in the kitchen.