6
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
OR THE FLUE TERMINALS OF OUTDOOR APPLIANCES
FIGURE 4
CLEARANCES ’n’ (mm)
Space heaters
All other appliances
Up to 50 MJ/h
input
UP to 50 MJ/h
input
Over 50 MJ/h &
up
to 150 MJ/h
Over 150 MJ/h
input
150
500
1000
1500
T = Flue terminal
M =
Gas meter
Shading indicates prohibited
I = Mechanical air inlet
P =
Electricity meter or fuse box
areas for flue terminals
a
-
Below eaves, balconies or other projections: MIN. CLEARANCE(mm)
Appliances to 50 MJ/h input ................................................................................................ 300
Appliances over 50 MJ/h input ............................................................................................ 500
b
-
From the ground or above a balcony ...................................................................................... 300
c
-
From a return wall or external corner ...................................................................................... 500
d
-
From a gas meter (M) ............................................................................................................ 1000
e
-
From an electricity meter or fuse box (P) ................................................................................ 500
f
-
From a drain or soil pipe ......................................................................................................... 150
g
-
Horizontally from any building structure (unless appliance approved
for closer installation) or obstruction facing a terminal .......................................................... 500
h
-
From any other flue terminal, cowl, or combustion air intake ................................................ 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 ......................................................................................... 500
Appliances over 150 MJ/h input ........................................................................................ 1500
k
-
From a mechanical air inlet, including a spa blower .......................................................... 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
