Installation instructions – GE 164D4290P393 User Manual
Page 7
7
DUCTING CHART:
Flow vs. equivalent feet of duct length
0
20
40
60
80
100
Equivalent Feet of Duct Length
300
250
200
150
100
50
0
CFM
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.
JV347
JV338
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