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FLUE INSTALLATION DIMENSIONS & RESTRICTIONS FLUE TERMINAL CLEARANCES
Flue Terminal Clearances (extract from AS/NZS 5601)
g
T
S
LEGEN D:
I
= M e c hani c al air inl et
M = G a s m eter
P = El e c tr i c it y m eter or fu se b ox
S = S tr u c ture
T = Flu e ter m inal
Z = Fan - a s s i ste d a p p li an c e o nly
S had in g in d i c ate s pro hi b ite d area for flu e ter m inal s
R
. f e
Below eaves, balconies and other projections:
a
• Appliances up to 50 MJ/h input
• Appliances over 50 MJ/h input
b
F
o r
m
t
e h
r g
u o
d n
a ,
o b
e v
a
a b
o c l
c
r F
n o
a t
e r
u t
n r
w
l l a
r o
x e
r e t
a n
c l
From a gas meter (M) (see 5.11.5.9 for vent terminal location of regulator )
(see Table 6.6 for New Zealand requirements)
d
From an electricity meter or fuse box (P) †
e
f
F
o r
m
a
d
a r
n i
i p
e p
r o
i o s
i p l
e p
g
Horizontally from any building structure* = or obstruction facing a terminal
h
From any other flue terminal , cowl, or combustion air intake †
Horizontally from an openable window, door, non-mechanical air inlet, or any other opening into a
building with the exception of sub-floor ventilation:
• Appliances up to 150 MJ/h input *
• Appliances over 150 MJ/h input up to 200 MJ/h input *
j
• Appliances over 200 MJ/h input up to 250 MJ/h input *
• Appliances over 250 MJ/h input *
• All fan-assisted flue appliances , in the direction of discharge
k
F
o r
m
a
m
c e
a h
i n
l a c
r i a
l n i
, t e
n i
Vertically below an openable window, non-mechanical air inlet, or any other opening into a
building with the exception of sub-floor ventilation:
•
S
a p
e c
h
a e
e t
s r
p u
o t
0 5
M
J
h /
n
• Other appliances up to 50 MJ/hr input
• Appliances over 50 MJ/h input and up to 150 MJ/h input
• Appliances over 150 MJ/h input
* - unless appliance is certified for closer installation
† - Prohibited area below electricity meter or fuse box extends to ground level.
NOTES:
1
Where dimensions c, j or k cannot be achieved an equivalent horizontal distance
measured diagonally from the nearest discharge point of the terminal to the opening
may be deemed by the Technical Regulator to comply.
2
See Clause 6.9.4 for restrictions on a flue terminal under a covered area.
3
See Figure J3 for clearances required from a flue terminal to an LP Gas cylinder.
A flue terminal is considered to be a source of ignition.
4
For appliances not addressed above acceptance should be obtained from the
Technical Regulator.
FIGURE 6.2 (in-part) MINIMUM CLEARANCES REQUIRED FOR FAN-ASSISTED FLUE TERMINALS,
ROOM-SEALED APPLIANCE TERMINALS AND OPENINGS OF OUTDOOR APPLIANCES
Rinnai
O p ening into
a b u il d i n g
C
T
f
T
S e e N ote 1
e t I
m
y n
r o
t o
e h
s r
f r u
c a
* e
r o
e n
* r
u l c
i d
g n
a
s
a p
l b
w o
r e
i r
p n
t u
j
h
D o or
T
n
j
h
j
T
Z
b
D ire c t i o n of
d i s c h ar g e
Min. Clearances
(mm)
Fan Assisted
200
300
3
0 0
3
0 0
1000
500
75
500
300
300
300
500
1500
1500
0 1
0 0
i
Minimum clearance 500mm to nearest part
of roof
ii
1
0 5
Minimum clearance 25mm to combustible
500
materials
1000
iii
Decktite or lead collar flashing
1500
29
a
e
k
P
I
k
d
e
d
g
M
T
T
S e e N ote 1
iii
RHFE 952/1253 OIM
FLUEING
g
T
i
ii
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