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Installation
Instructions
WORKSHEET--CALCULATE
TOTAL EQUIVALENT
DUCTWORK
LENGTH
DUCT
PIECES
O
O
3¼"x 10"
Rect.,
straight
7" Round,
straight
6" Round,
straight
3¼"x 10"
Rect. 9 0°
elbow
3¼"x 10"
Rect. 4 5°
elbow
3¼"x 10"
Rect. 9 0°
flat elbow
3¼"x 10"
Rect.
wall cap
with
damper
3¼"x 10"
Rect. t o
6" round
transition
3¼"x 10"
Rect. t o
6" round
transition
90 ° elbow
EQUIVALENT
NUMBER
LENGTH
x USED
1Ft.
x (
)
1Ft.
x (
)
1Ft.
x (
)
8.5Ft.
x (
)
7Ft.
x (
)
24 Ft.
x (
)
45 Ft.
x (
)
(7ft. w/o
damper)
x (
)
4.5Ft.
x (
)
11.5Ft.
x (
)
(_
6" Round,
8 Ft.
x (
)
90 ° elbow
(_
6" Round,
6.5Ft.
x (
)
45° elbow
Subtotalcolumn1
=
= TOTAL
=
Ft.
=
Ft.
=
Ft.
=
Ft.
=
Ft.
=
Ft.
=
Ft.
=
Ft.
=
Ft.
=
Ft.
=
Ft.
=
Ft.
Ft.
MAXIMUM
DUCT
LENGTH:
For satislthctorx
air
i/loveil/ent,
the
total
(h/ct
length
o_' a 3¼"
x 10"
rectangular,
6" or 7" diameter
romid
duct
should
not
exceed
65 equivalent
feet,
DUCT
PIECES
6"Round
wall cap
with
damper
6" Round
roofcap
6" Round
to
3¼"x 10"
rect.
transition
6" Round
to
3¼"x 10"
rect.
transition
90° elbow
EQUIVALENT
NUMBER
LENGTH
x USED
34 Ft.
x (
)
(6 ft. w/o
damper)
x (
)
30 Ft.
x (
)
5.5Ft.
x (
)
14.5Ft.
x (
)
(_
7" Round, 8 Ft.
x (
)
90° elbow
7" Round, 6.5R.
x (
)
45° elbow
C_
7"Round
34 Ft.
x (
)
wall cap
(6 ft. w/o
with
damper)
x (
)
damper
<_
7" Round 30 Ft.
x (
)
roofcap
7" Round
5.5Ft.
x (
)
_,_
to
3¼"x 10"
rect.
transition
14.5R.
x (
)
7" Round
to
3¼"x 10"
rect.
transition,
90° elbow
Subtotalcolumn2
Subtotalcolumn1
Totalductwork
= TOTAL
Ft.
Ft.
Ft.
Ft.
Ft.
Ft.
Ft.
Ft.
Ft.
Ft.
Ft.
Ft.
=
Ft.
=
Ft.
=
Ft.
8
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