Vent-a-Hood M series Owner And Maintenance Manual - Is The Hood Ducted Properly?
Page 7
Maintenance/Troubleshooting (Continued)
equipment.
Is the hood ducted properly?
The duct should be smooth walled. Corrugated or “flex” type duct
must not be used as it restricts airflow. The duct work should be the
same square inch area (or larger) as the hood discharge for the
entire length of the duct run. Run the duct as short and straight as
possible. Enlarge the duct for longer duct runs. Maintain 4 to 5 foot
spacing between turns. Turns should be smooth and gradual, not
sharp and angled. Roof jack and wall louver openings must be free
of obstacles, at least as large as the duct size, and open freely.
Is the hood mounted at the appropriate height off of the cooking
surface?
The height of the hood off the cooking surface is very important. The
higher the hood is mounted, the less effective it will be. Hoods only
collect cooking vapors; they will not pull cooking contaminants back
into the hood if they escape into the kitchen. Generally speaking,
the deeper the hood, the higher the hood can hang and still be
effective.
Wall Mount
30”
Standard Liner - MSLD
24-27”
Pro Liner - MPSLD
27-30”
NOTE: If smoke still enters the kitchen after following these
suggestions, contact your dealer for additional service and/or
suggestions.