6
IMPORTANT:
•
A minimum of 6 inch round
1
(standard for this range hood) ) must be used to maintain maximum airflow
efficiency.
•
Always use rigid type metal/aluminum ducts if available to maximize airflow
•
Please use Duct Run Calculation below to compute the 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 inch
1
. If a reducer is used, install a long reducer instead of a pancake reducer.
Reducing duct size will restrict 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 as possible.
•
Minimum mount height between stove top to hood bottom should be no less than 28 inches* for
electric ranges and 30 inches* for gas ranges.
•
Maximum mount height between stove top to hood bottom should be no higher than 31 inches* for
electric ranges and 36 inches* for gas ranges.
•
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.
•
If available, also refer to stove top manufacturer’s height clearance requirements and recommended
hood mounting height above range.
Minimum Duct Size:
•
Round 6 inch minimum
1
* Due to different ceiling height configurations, recommended height may not be applicable.
1
Turin Extreme 48 Inch (TU11191S-I48) requires an 8 inch duct.
4. CALCULATING VENT SYSTEM HEIGHT
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:
Recommended maximum run
6” or 3-1/4 x 10” duct
50 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
Duct Run Calculation example:
One roof cap, two 90º elbow, and one 45º elbow used:
0ft + 9ft + 9ft + 5ft = 23ft used.
Deduct 23ft from 50ft, 27ft maximum available for
straight duct run.
