GE PVUS930, Owner'S Manual And Installation Instructions, Page: 9 / 42

8
DUCT EQUIVALENT NUMBER
PIECES LENGTH x USED = TOTAL
3 1 ⁄
4
” x 10” 1 Ft. x ( ) = Ft.
Rect.,
straight
7” Round, 1 Ft. x ( ) = Ft.
straight
6” Round, 1 Ft. x ( ) = Ft.
straight
3 1 ⁄
4
” x 10” 14 Ft. x ( ) = Ft.
Rect. 90°
elbow
3 1 ⁄
4
” x 10” 8 Ft. x ( ) = Ft.
Rect. 45°
elbow
3 1 ⁄
4
” x 10” 33 Ft. x ( ) = Ft.
Rect. 90°
flat elbow
3 1 ⁄
4
” x 10” 24 Ft. x ( ) = Ft.
Rect. (18 ft. w/o
wall cap damper) x ( ) = Ft.
with
damper
3 1 ⁄
4
” x 10” 2 Ft. x ( ) = Ft.
Rect. to
6” round
transition
3 1 ⁄
4
” x 10” 4 Ft. x ( ) = Ft.
Rect. to
6” round
transition
90° elbow
6” Round, 25 Ft. x ( ) = Ft.
90° elbow
6” Round, 16 Ft. x ( ) = Ft.
45° elbow
Subtotal column 1 = Ft.
WORKSHEET—CALCULATE TOTAL EQUIVALENT DUCTWORK LENGTH
DUCT EQUIVALENT NUMBER
PIECES LENGTH x USED = TOTAL
6” Round 53 Ft. x ( ) = Ft.
wall cap (39 ft. w/o
with damper) x ( ) = Ft.
damper
6” Round 72 Ft. x ( ) = Ft.
roof cap
6” Round 3 Ft. x ( ) = Ft.
to
3
1 ⁄
4
” x 10”
rect.
transition
6” Round 9 Ft. x ( ) = Ft.
to
3
1 ⁄
4
” x 10”
rect.
transition
90° elbow
7” Round, 14 Ft. x ( ) = Ft.
90° elbow
7” Round, 9 Ft. x ( ) = Ft.
45° elbow
7” Round 28 Ft. x ( ) = Ft.
wall cap (21 ft. w/o
with damper) x ( ) = Ft.
damper
7” Round 39 Ft. x ( ) = Ft.
roof cap
7” Round 1 Ft. x ( ) = Ft.
to
3
1 ⁄
4
” x 10”
rect.
transition
7” Round 5 Ft. x ( ) = Ft.
to
3
1 ⁄
4
” x 10”
rect.
transition,
90° elbow
Subtotal column 2 = Ft.
Subtotal column 1 = Ft.
Total ductwork = Ft.
Installation Instructions
MAXIMUM DUCT LENGTH: For satisfactory air movement,
the total duct length of a 3 1 ⁄
4
” x 10” rectangular, 7” diameter
round duct should not exceed 65 equivalent feet.
1 ft = 0.3 m; 1 in. = 2.5 cm