GE JGP979 Owner's Manual page 25

Installation Instructions
DUCT LENGTH CHART
Duct Fitting Number Total Equivalent
Duct Fitting Equivalent Length of Fittings Length of Fitting
8" Diameter 90 ° Elbow
5 ft.
(1.52 m)
6" Diameter 45 ° Elbow 2.5 ft.
(0.76 m)
\', 5" to 6" Transition
1 ft.
_Air Flow (12.7 cm to 15.24 cm) (0.30 m)
Air Flow this direction not recommended.
6"to 31/4"x 10"90 ° Elbow
5 ft.
(15.24 cm to 8.26 cm x 25.4 cm) (1.52 m)
Air Flow
_ 3W'xlO"to6"90°Elbow 9ft,
(8.26 cm x 25.4 cm to 15.24 cm) (2.75 m)
Air Flow
Air Flow 6" to 31/4 " X 10" Transition
1 ft.
(15.24 cm to 8.26 cm x 25.4 cm) (0.30 m)
31_"x 10"to 6"Transition
4.5 ft.
(8.26 cm x 25.4 cm to 15.24 cm) (1.37 m)
Air Flow
_Air Flow 5" to 31/4 ", X 10" 90 ° Elbow
6 ft.
(12.7 cm to 8.26 cm x 25.4 cm) (1.83 m)
Air Flow this direction not recommended.
31/4"X 10"90 ° Elbow
5 ft.
(8.26 cm x 25.4 cm) (1.52 m)
31/4"x 10" Flat Elbow
12 ft,
(8.26 cm x 25.4 cm) (3.66 m)
6" Wall Cap
28 ft.
(15.24 cm) (8.53 m)
31/4"x 10" Wall Cap
20 ft.
(8.26 cm x 25.4 cm) (6.10 m)
10"x 10" Roof Jack
0 ft.
(25.4 cm x 25.4 cm) (0 m)
Thermal Break
2 ft.
(0.61 m)
6" Diameter Straight Duct-Feet
1 ft.
(For flex duct multiply by 2.) (0.30 m)
31_" x 10" Straight Duct-Feet
1 ft.
(0.30 m)
System Total
25