Installation instructions
DUCTING
COMPONENT
EQUIVALENCY
CHART
Z_
A
5"
J
o
C_a:
LU
¢¢
p=
o_
m
d
.=J _J
m =j
I=-
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v
_L
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DUCT PIECES
_lLess
Than 4 Ft._
2.5"
-4,.3,F
/cm}!
Rigid
Metal
Ducting
(Preferred)
UL-Listed
Semi-Rigid
Metal
Ducting
(inside
diameter
does not change)
EI bows
(90°/45 °)
Turns
less
Than
4 Ft,
Rigid
Metal
Ducting
4" Wall
Cap
Louvered
Wall
Cap
2.5" Wall Cap
EQUIVALENT
RIGID
NUMBER
LENGTH
X
USED
1 Ft.
X
3 Ft,
X
10 Ft.
X
2 Ft.
X
1 Ft.
X
5 Ft.
X
10 Ft.
X
()
()
()
()
()
()
()
()
23 Ft.
X
Total Ductwork
Length
TOTAL MUST
BE LESS THAN
OR EQUAL
TO 150 FT.
EQUIVALENT
LENGTH
Ft.
Ft.
Ft.
Ft.
Ft.
Ft.
Ft.
Ft.
Ft.
31