
15
Page
For details of the op
tional i
tems, refer t
o the In
stalla
tion manual
for each op
tional i
tem.
<How to install intake and exhaust ven
ting
(two-pipe, direct-vent)
3" vent
From 3" to 4" vent
3” c
oupling
Exhau
st ve
n
t collar
(Female)
3” straight pipe
3” c
oupling
I
n
take ve
n
t collar
(Female)
3” straight pipe
1.
Connect
3" c
ouplings
directly
on
the
e
xhau
st
and
i
n
take ve
n
t collar
of the micro-boiler.
2.
Connect
3” straight pipes to the
c
ouplings.
1.
Connect
3"x4"
inc
reasers
directly
on
the e
xhau
st
and
i
n
take
ve
n
t collar of the micro-boiler.
2.
Connect
4” straight pipes to
the
inc
reasers.
4” straight pipe
3"x4" inc
reaser
Exhau
st ve
n
t collar
(Female)
I
n
take ve
n
t collar
(Female)
4” straight pipe
3"x4" inc
reaser
Horizontal
Roof
Roof
Fire stop
Wall
Connect b
etw
een
e
xhau
st ve
n
t c
ollar and piping.
See the
below.
Typical
using
PVC, ABS, or polypropylene vent