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7
3
1
⁄
4
″ x 10″ Rectangular Transition to 6″ Round = 2 ft.
7″ Round 90° Elbow = 14 ft.
7″ Roof Cap = 39 ft.
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.
DUCTING CHART—JV5 Series Models
0 25 50 75 100 125 150 175
Equivalent Length (feet)
300
250
200
150
Air Volume (CFM)
3
1
⁄4″ x 10″
Rectangular
7″ Round
•
•
•
•
•
•
•
•
•
•
•
•
DUCTING CHART—JV6 Series Models
0 25 50 75 100 125 150
Equivalent Length (feet)
450
400
350
300
250
200
Air Volume (CFM)
3
1
⁄4″ x 10″
Rectangular
7″ Round
•
•
•
•
•
•
•
•
•
•
•
•
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