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MOUNTING HEIGHTS
10"
Min 24"-Max 32"
36"
DUCTING
A minimum of 6" round or 3-1/4" x 10"rectangular
duct must be used to maintain maximum air flow
efficiency.
Always use rigid type metal ducts only.
Flexible ducts could restrict air flow by up to 50%.
Also use calculation (on right) to compute total
available duct run when using elbows, transitions
and caps.
ALWAYS, when possible, reduce the number of
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. Reduce duct size as far away from open-
ing as possible.
If turns or transitions are required:
Install as far away from opening and as far
apart, between 2, as possible.
INSTALLATION
Minimum mounting height between range top
to hood bottom should be no less than 24".
Maximum mounting height should be no
higher than 32".
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 will be
hard to reach and will loose performance
and efficiency.
96"
If available, also refer to range manufacturer's
height clearance requirements and recom-
mended hood mounting height above range.
Minimum Duct Size:
Round:
6" minimum
Rectangular:
3-1/4" x 10"
Duct Run Calculation:
Maximum run
6" or 3-1/4" x 10" duct
Deduct:
each 90 Elbow used
each 45 elbow used
each 6" to 3/14 x 10"
transition used
each 3/14 x 10" to 6"
transition used
Side Wall Cap w/ damper
Roof Cap
e.g.- 1 roof cap, 2x90 elbows, 1 x 45 elbow used:
=30' + 30' + 9' =69' used, 31' available for straight duct runs.
2
100 FT
15 FT
9 FT
1 FT
5 FT
30 FT
30 FT
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