Wolf Ventilation Hood - Manual (Page 10)

Cooktop Chimney Hood Installation 10
Install Ductwork
IMPORTANT NOTE: Cooktop chimney ventilation hoods
must exhaust to the outdoors.
An 8" (203) round duct is recommended for cooktop
chimney hoods. Use only rigid metal ductwork, do not use
flex ducting.
Decide where the ductwork will run between the wall hood
and the outside. A straight, short duct run will allow the
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.
Wolf recommends installing a backdraft damper in all
installations. A backdraft damper is included with the
hood. It is built into the transition from the hood to the
duct run. In cold weather installations a backdraft damper
is necessary to minimize the backflow of cold air into the
room.
Unless you are using a remote blower, a roof or wall cap
must be installed. Connect ductwork to the cap and work
back towards the hood. Use duct sealing tape to seal
joints between ductwork sections. Refer to the illustrations
on the following page.
To reduce the risk of fire, use only metal ductwork.
To reduce the risk of fire and electric shock, install this
ventilation hood only with a Wolf blower.
Local building codes may require the use of make-up air.
Consult your local HVAC professional for specific require-
ments in your area.
IMPORTANT NOTE: Consult a qualified HVAC engineer for
specific ducting applications.