1
3
Ŗ
Ŗ
Ŗ
When
the
l
ength
of
the
flue
du
c
t
is
l
ess
than
2m,
use
the
flue
du
c
t
of
φ
75mm
in
diameter.
When
the
l
ength
of
the
flue
du
c
t
is
between
2m
and
5m,
use
the
flue
du
c
t
of
φ1
00mm
in
diameter.
When
the
l
ength
of
the
flue
du
c
t
is
l
onger
than
5m,
use
the
flue
du
c
t
of
φ1
25mm
in
diameter.
Ŗ
Ŗ
Ŗ
Ŗ
Che
c
k
out
that
the
floor
is
robust
and
flat
inflammab
l
es
su
c
h
as
c
on
c
rete
and
the
c
ir
c
umferen
c
e
is
a
l
so
made
of
inflammab
l
es.
Che
c
k
out
whether
rainwater
infi
l
trates
into
the
perforation
of
the
exhaust/inha
l
e
pipes.
Che
c
k
out
whether
the
boi
l
er
is
c
onne
c
ted
to
the
ground.
Che
c
k
out
that
the
boi
l
er
and
the
pipes
is
in
the
good
heat
insu
l
ation
in
order
to
prevent
freezing.
T
he
exam
p
le
of
a
standard
installation
When
extending
the
aluminum
flue
duct
Checking
p
oints
after
installation
Front View
Wall
Inflammable material
side Inflammable material
Exhaust
inhale pipe
Exhaust /
inhale pipe
30cm or more
60cm or more
Ň
Ň
B
O
I
L
E
R
F
insulation
nonflammable
E
F
D
C
A
B
Ground
Over 20cm
Ground View
Summary of Contents for KDB-203 STC
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