Product Overview

The Tamarack Cape Backdraft
Damper is a non-mechanical
in-line one way air flow valve
that requires minimal pressure
to open or close. Tested to
UL 723 and NFPA 255 standards.
This non-restrictive damper
fits inside the duct.
4”, 5”, 6”, 7” & 8”
sizes available.
MAXIMUM
Cape Backdraft Damper
The
Ca
pe
B
a
c
k
dr
a
ft Da
mpe
r
w
a
s te
ste
d a
ga
inst
tw
o othe
r
da
mpe
r
s a
t mode
r
a
te
a
ir
flow
(a
ir
flow
typic
a
l for
a
re
side
ntia
l ve
ntila
tion a
pplic
a
tion).
The
fa
n r
a
n using ope
n duc
tw
or
k
to se
t the
de
sire
d a
ir
flow
.
Ea
c
h type
of da
mpe
r
w
a
s the
n
inse
r
te
d into the
a
ir
stre
a
m.
The
a
ir
flow
w
a
s
me
a
sure
d a
nd the
le
a
k
a
ge
r
a
te
s a
t va
r
ious
pre
ssure
s re
c
orde
d for
c
ompa
r
ison in the
c
ha
r
ts on the
r
ight a
nd be
low
.
Metal Sleeve O.D.
P/N CBD-5
AIR FLOW!
800-222-5932