manual

I
f
w
e
r
equir
e
a
v
o
l
u
m
e
of
2.
5
cu
ft
th
en
w
e
multipl
y
thi
s
b
y
17
2
8
2.
5
x
172
8=
4
3
2
0
cub
i
c
in
c
h
es.
W
e
no
w t
a
k
e
2
kn
o
w
n
e
n
c
l
osu
r
e
d
im
e
n
s
i
o
n
s
th
at
w
e
will
use
,
e
.
g
h
ei
g
h
t
a
n
d
wi
d
t
h
a
n
d
d
ivi
de
thi
s
f
i
g
ur
e
b
y
th
e
m whi
ch
will
g
ive
us
th
e
depth,
fo
r
e
xampl
e
our
h
ei
g
h
t
i
s
15
”,
our
wi
d
t
h
i
s
2
0”.
So
our
dept
h
i
s
14.4
”
fo
r thi
s
e
n
c
l
osu
r
e
.
N
o
t
e
:
thi
s
fo
rm
u
l
a
i
s
fo
r th
e
INTERNA
L
dimensions,
p
leas
e
add
th
e
thi
c
kn
ess
of
th
e
m
a
t
e
ri
a
l
used
t
o
co
n
s
tr
uct
th
e
e
n
c
l
osu
r
e
t
o
th
e
fo
rm
u
l
a
t
o
g
iv
e
you
th
e
ou
t
s
i
de
d
im
e
n
s
i
o
n
s
.
So
assumin
g
w
e
are
u
sin
g
1
in
ch
m
a
t
e
ri
a
l w
e
need
t
o
add
2
thi
c
kn
esses
t
o
each
int
e
rn
a
l
d
im
e
n
s
i
on
t
o
a
ll
o
w
fo
r m
a
t
e
ri
a
l to
p
a
n
d
bottom,
so
th
e
e
xt
e
rn
a
l
d
im
e
n
s
i
o
n
s
fo
r thi
s
e
n
c
l
osu
r
e
w
ou
l
d
be
1
7
x
2
2
x
1
6
.4 in
c
h
es
.
Th
e
displacemen
t
of
th
e
w
oofe
r
a
n
d
th
e
displacemen
t
of
th
e
p
or
t
m
ust
a
l
so
be
added
t
o
th
e
r
equire
d
v
o
l
u
m
e
befo
r
e
you
ca
l
cu
l
a
t
e
th
e
r
equire
d
s
iz
es
needed
t
o
bu
il
d
yo
u
r
e
n
c
l
osu
r
e
.
N
O
TE- Wh
en
u
sin
g
a
p
or
t
you
m
ust
lea
v
e
a
gap
at
least
e
qua
l
t
o
th
e
s
h
o
rt
est
m
easu
r
e
m
e
n
t
of
th
e
p
or
t
be
tw
een
th
e
rear
of
th
e
e
n
c
l
osu
r
e
a
n
d
th
e
p
ort.
7