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Equivalent number
Duct pieces
length x used
3- 1/ 4" x 10"
1 Ft.
Rect.,
straight
7" Round,
1 Ft.
straight
8" Round,
1 Ft.
straight
3- 1/ 4" x 10"
15 Ft.
Rect. 90
0
elbow
3- 1/ 4" x 10"
9 Ft.
Rect. 45
0
elbow
3- 1/ 4" x 10"
24 Ft.
Rect. 90
0
flat elbow
3- 1/ 4" x 10"
30 Ft.
Rect.
wall cap
with damper
3- 1/ 4" x 10"
5 Ft.
Rect. to
6" round
transition
3- 1/ 4" x 10"
20 Ft.
Rect. to
6" round
transition
90
0
elbow
6" Round,
15 Ft.
90
0
elbow
6" Round,
9 Ft.
45
0
elbow
Subtotal column 1 =
Longueur maximale du conduit d'aération :
mouvement d'air convenable, la longueur totale d'un conduit
d'aération ne devrait pas compter plus que l'équivalent
de 100 pieds.
Duct pieces
=
T otal
Ft.
x (
) =
x (
) =
Ft.
Ft.
x (
) =
x (
) =
Ft.
x (
) =
Ft.
x (
) =
Ft.
Ft.
x (
) =
x (
) =
Ft.
x (
) =
Ft.
x (
) =
Ft.
Ft.
x (
) =
Ft.
Pour un
Equivalent number
length x used
6"- 8" Round
30 Ft.
wall cap
with damper
6"- 8" Round,
30 Ft.
roof cap
6" round to
1 Ft.
3- 1/ 4" x 10"
rect.
transition
6" round to
16 Ft.
3- 1/ 4" x 10"
rect.
transition
90
0
elbow
7" or 8"
15 Ft.
Round,
90
0
elbow
7" or 8"
9 Ft.
Round,
0
45
elbow
7" or 8"
30 Ft.
Round
wall cap
with damper
7" or 8"
30 Ft.
Round,
roof cap
7" round to
8 Ft.
3 1/ 4" x 10"
rect.
transition
7" round to
23 Ft.
3- 1/ 4" x 10"
rect.
transition
90
0
elbow
Subtotal column 2 =
Subtotal column 1 =
Total ductwork
5
=
T otal
x (
) =
Ft.
x (
) =
Ft.
Ft.
x (
) =
x (
) =
Ft.
x (
) =
Ft.
x (
) =
Ft.
Ft.
x (
) =
Ft.
x (
) =
Ft.
x (
) =
Ft.
x (
) =
Ft.
Ft.
=
Ft.
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