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8
Duct Run Calculation Chart
Recommended Maximum Straight Duct Run
6" round duct 50 ft
Vent Piece Deduction Quantity Used
Each 90º elbow used 9 ft x() =()ft
Each 45º elbow used 5 ft x() =()ft
Side wall cap with damper 0 ft x() =()ft
Roof cap 0 ft x() =()ft
Total Vent Piece Deduction
=()ft
Recommended Maximum Straight Duct Run Total Vent Piece Deduction Total Available Duct Run
50 ft - ( ) ft = ( ) ft
Example:
Oneroofcap,two90ºelbow,andone45ºelbowused:0ft+9ftx2+5ft=23ftused.
Total Available Duct Run
= 50 ft - 23 ft = 27 ft.
INSTALLATION PREPARATIONS
• The minimum mounting height should be no
less than 24" and the maximum mounting height
should be no more than 30".
• Also refer to the owner's manual of the stove
top for the height clearance requirement and the
recommended mounting height above the range.
Note
• It is important to install the range hood at the
proper mounting height. Hoods mounted too
lowcouldresultinheatdamageandrehazard
while hoods mounted too high will be out of
reach and hense reduce its performance and
eciency.
Minimum Duct Size:
• Round: 6" minimum.
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