When a vented hood is mounted under the cabinet or on a wall, the duct has to run through or behind the cabinets to an outer wall.

For a ceiling-mounted or island range hood, the duct must run above the ceiling.

Can I vent my range hood into the attic?

A: It is definitely not a good idea to vent a range hood into the attic. Ideally, the range hood should be vented to the outside, usually through the roof. If dumped into the attic, the moisture and other vapors can cause a great deal of mischief.

How do you install a range hood vent?

How far can you vent a range hood?

For optimum performance, make sure that the air duct is short and straight, with a maximum length of 50 linear feet.