Installing the hood
Installing preparation
•The vent hood should be on site before final framing and wall finishing. This will help to accurately locate the duct work and electrical service.
•Installation will be easier if the vent hood is installed before the
Ductwork and wiring locations:
•Determine the exact location of the vent hood.
•Plan the route for venting exhaust to the outdoors.
•Use the shortest and straightest duct route possible.
For satisfactory performance duct run should not exceed 100’ equivalent length for any duct configurations.
•Refer to “Ductwork installation guidelines” chart to compute the maximum permissible length for duct runs to the outdoors.
Ductwork installation guidelines
For safety reasons, ducting should vent directly outdoors (not into an attic, underneath the house, into the garage or into any enclosed space). Keep duct runs as short and straight as possible. Duct fittings (elbows and transitions) reduce air flow eficiency.
Back to back elbows and “S“ turns give very poor delivery and are not recommended.
A short straight length of duct at the inlet of the remote blower gives the best delivery. Transition to duct from the integral blower or remote duct transition as close to the downdraft as is possible.
In order of preference, use 1st. 10” round duct 2nd. 8” round duct
3rd.
The use of flexible metal round duct should only be used when no other duct fitting exists. Limit use to short lengths and do not crush when making corners.
•Install a wall cap with damper or roof cap at the exterior opening. Order the wall or roof cap and any transition needed in advance.
•Use 8” round metal ductwork only.
Removing the packaging
Remove the carton carefully. Wear gloves to protect against sharp edges.
Remove the protective !lm covering the product before putting into operation.