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n
f
c
T = Flue terminal
I = Mechanical air inlet
a
-
Below eaves, balconies or other projections:
Appliances up to 50 MJ/h input .................................................................................... 12 (300)
Appliances over 50 MJ/h input ..................................................................................... 20 (500)
b
-
From the ground or above a balcony ............................................................................... 12 (300)
c
-
From a return wall or external corner ............................................................................... 20 (500)
d
-
From a gas meter (M) ...................................................................................................... 39 (1000)
e
-
From an electricity meter or fuse box (P) ......................................................................... 20 (500)
f
-
From a drain or soil pipe .................................................................................................... 6 (150)
g
-
Horizontally from any building structure (unless appliance approved
for closer installation) or obstruction facing a terminal ..................................................... 20 (500)
h
-
From any other flue terminal, cowl, or combustion air intake .......................................... 20 (500)
j
-
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 .................................................................................. 20 (500)
Appliances over 150 MJ/h input ................................................................................... 59 (1500)
k
-
From a mechanical air inlet, including a spa blower ....................................................... 59 (1500)
n
-
Vertically below an openable window, non-mechanical air
inlet or any other opening into a building, with the exception of ...................................... See table
sub-floor ventilation ................................................................................................................ below
Space Heaters
Up to 50 MJ/h input
6 in. (150 mm)
NOTES:
1. All distances are measured vertically or horizontally along the wall to a point
in line with the nearest part of the terminal.
2. Prohibited area below electricity meter or fuse box extends to ground level.
3. See clause 5.13.6.6 for restrictions on a flue terminal under a roofed area.
4. See Appendix J, Figure J1(a) and J2(a) for clearances required from a flue
terminal to a LP Gas cylinder. A flue terminal is considered to be a source of ignition.
MINIMUM CLEARANCES REQUIRED FOR BALANCED FLUE TERMINALS
Figure 4
j
j
j
openable
window
door
k
I
k
M = Gas meter
P = Electricity meter or fuse box
CLEARANCE
Up to 50 MJ/h input
20 in. (500 mm)
OR THE FLUE TERMINALS OF OUTDOOR APPLIANCES
Heat & Glo • ST-HVBI-AUB • 2082-980 Rev. R • 9/15
T
h
e
e
h
P
h
T
d
g
See note 2
Shading indicates prohibited
areas for flue terminals
MIN. CLEARANCE - in. (mm)
All other appliances
Over 50 MJ/h input and
Up to 150 MJ/h input
39 in. (1000 mm)
a
c
d
See note 3
g
M
b
T
Over 50 MJ/h input
59 in. (1500 mm)
7
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