In-Line Blower Manual

5
Duct pieces
To tal
Equivalent number
length x used =
3-1/ 4” x 10”
Rect.,
straight
1Ft. x( )=
Ft.
7”-10” Round,
straight
1Ft. x( )=
Ft.
3-1/ 4” x 10”
Rect.90
0
elbow
15 Ft. x( )=
Ft.
3-1/ 4” x 10”
Rect.45
0
elbow
9Ft. x( )=
Ft.
3-1/ 4” x 10”
Rect.90
0
flat elbow
24 Ft. x( )=
Ft.
3-1/ 4” x 10”
Rect.
wallcap
with damper
30 Ft. x( )=
Ft.
3-1/ 4” x 10”
Rect.to
6” round
transition
5Ft. x( )=
Ft.
3-1/ 4” x 10”
Rect.to
6” round
transition
90
0
elbow
20 Ft. x( )=
Ft.
6” Round,
90
0
elbow
15 Ft. x( )=
Ft.
6” Round,
45
0
elbow
9Ft. x( )=
Ft.
Ft.
6” Round,
straight
1Ft. x( )=
Ft.
Subtotal column 1=
Duct pieces
To tal
Equivalent number
length x used =
6” Round
wall cap
withdamper
30 Ft. x( )=
Ft.
Round
wall cap
withdamper
30 Ft. x( )=
Ft.
7” - 10”
Round,
90
0
elbow
15 Ft. x( )=
Ft.
7” - 10”
7” - 10”
Round,
45
0
elbow
9Ft. x( )=
Ft.
Ft.
Ft.
Ft.
6” Round,
roof cap
30 Ft. x( )=
Ft.
7” - 10”
Round,
roof cap
30 Ft. x( )=
Ft.
Subtotal column 2=
Subtotal column 1=
Total ductwork =
6” round to
3-1/ 4” x 10”
rect.
transition
1Ft. x( )=
Ft.
6” round to
3-1/ 4” x 10”
rect.
transition
90
0
elbow
16 Ft. x( )=
Ft.
7” round to
31/4” x 10”
rect.
transition
8Ft. x( )=
Ft.
7” round to
3-1/ 4” x 10”
rect.
transition
90
0
elbow
23 Ft. x( )=
Ft.
Maximum Duct Length: For satisfactory
air movement, the total duct length should
not exceed 100 equivalent feet.
Installation – Ductwork Calculation Sheet