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7
DUCTING CHART—JV5 Series Models
DUCTING CHART—JV6 Series Models
Equivalent Length in Feet
0 25 50 75 100 125 150
3
1
⁄4″ x 10″ Rectangular Transition to 6″ Round = 4.5 ft.
7
″ Round 90° Elbow = 8 ft.
7
″ Roof Cap = 30 ft.
250
200
150
100
Air Volume in CFM
3
1
⁄4″ x 10″
Rectangular
7″ Round
•
•
•
•
•
•
•
•
•
Equivalent Length in Feet
0 25 50 75 100 125 150
3
1
⁄4″ x 10″ Rectangular Transition to 6″ Round = 4.5 ft.
7
″ Round 90° Elbow = 8 ft.
7
″ Roof Cap = 30 ft.
400
350
300
250
200
Air Volume in CFM
3
1
⁄4″ x 10″
Rectangular
7″ Round
•
•
•
•
•
•
•
•
•
•
•
Follow the guidelines for proper duct sizing in the ducting charts.
Installation Instructions
MAXIMUM DUCT LENGTH: For satisfactory air movement, the total duct length of a 3
1
⁄4″ x 10″ rectangular,
6″ or 7″ diameter round duct should not exceed 65 equivalent feet.
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