Wolf Appliance Company L342212 - Manual (Page 8)

Pro Hood Liner Installation 8
Install Ductwork
IMPORTANT NOTE: Pro ventilation hood liners must
exhaust to the outdoors.
Wolf recommends that the ventilation hood be installed
30" (762) to 36" (914) above the countertop. Consult a qual-
ified HVAC engineer for specific ducting applications.
A 10" (254) round duct is recommended for pro ventilation
hood liners. Use only rigid metal ductwork, do not use flex
ducting.
Decide where the ductwork will run between the hood liner
and the outside. Pro hood liners have a vertical discharge.
A straight, short duct run will allow the ventilation hood to
perform most efficiently. Limit the number of elbows and
transitions. The duct run should be no longer than 50'
(15 m) . There is a possibility of noise issues, if a remote
blower is used with a short duct run.
Unless you are using a remote blower, a roof or wall cap
must be installed. Connect 10" (254) round metal ductwork
to the cap and work back towards the hood. Use duct
sealing tape to seal joints between ductwork sections.
Pro hood liners have a backdraft damper included in the
transition assembly. Local codes may require the use of an
additional backdraft damper. Contact your local HVAC
professional for specific requirements. In cold weather
installations, a backdraft damper is necessary to minimize
the backflow of cold air into the room.
Local building codes may require the use of make-up air.
Consult your local HVAC professional for specific require-
ments in your area.
PRO HOOD LINERS
To reduce the risk of fire, use only metal ductwork.
DUCTWORK INSTALLATION
THROUGH ROOF
30" (762) TO 36" (914)
BOTTOM OF
HOOD TO
COUNTERTOP
12" (305)
LINER HEIGHT
22 1 / 2 " (572)
LINER DEPTH
12"
(305)
4" (102)
DECORATIVE HOOD