IMPORTANT:
• A minimum of 6” round or 3-1/4 x 10” rectangular duct (purchased separately) must be used to
maintain maximum airflow efficiency.
• Always use rigid type metal/aluminum ducts if available to maximize airflow when connecting to
provided duct.
• Please use
Duct Run Calculation
below to compute total available duct run when using elbows,
transitions and caps.
• ALWAYS, when possible, reduce the number or transitions and turns. If long duct run is required,
increase duct size from 6” to 7” or 8”. If a reducer is used, install a long reducer instead of a pancake
reducer. Reducing duct size will restrict airflow and decrease airflow, thus reduce duct size as far away
from opening as possible.
• If turns or transitions are required: Install as far away from opening and as far apart, between 2, as
possible.
• Minimum mount height between stove top to hood bottom should be no less than 24-inch for electric
cook tops and minimum of 30” for gaz stove tops and no higher than 30 inch for electric cook tops.
• It is important to install the hood at the proper mounting height. Hoods mounted too low could result in
heat damage and fire hazard; while hoods mounted too high may be hard to reach and will lose its
performance and efficiency.
• If available, also refer to stove top manufacturer’s height clearance requirements and recommended
hood mounting height above range.
To calculate the length of the system you need, deduct the equivalent feet for each vent piece used in the
system from the recommended maximum duct run
Duct Run Calculation example:
One roof cap, two 90º elbow, and one 45º elbow use
0ft + 9ft + 9ft + 5ft = 23ft used.
Deduct 23ft from 30ft, 7ft maximum available
for straight duct run.
Duct Run Calculation:
Recommended maximum run
6” or 3-1/4 x 10” duct
30 ft
Vent piece deduction
Each 90º elbow used
9 ft
Each 45º elbow used
5 ft
Each 6” to 3/14 x 10” transition used
7 ft
Side wall cap with damper
0 ft
Roof cap
0 ft
3-1/4 x 10” transition used
Summary of Contents for 45 0 C FM
Page 4: ......
Page 11: ... ...
Page 18: ...18 ...
Page 20: ... bracket bracket UPPER AND LOWER CHIMNEY BRACKETS ...
Page 21: ...Decorative chimney bracket 19 to 38 1 4 ...
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Page 40: ...41 ...
Page 42: ... SUPPORT CHEMINÉE HAUT SUPPORTS CHEMINÉE HAUT ET BAS SUPPORT CHEMINÉE BAS ...
Page 43: ...19 3 4 19 to 38 1 4 ...
