37
System Design
LOCATION OF OUTLET
P
O
N
M
A
D
B
C
A
600mm
min
600mm
min
less
than
600mm
1500
1500
600 min
Chimney should
not penetrate
within the
shaded area
600
600
2000
P
O
N
M
A
D
B
C
A
600mm
min
600mm
min
less
than
600mm
1500
1500
600 min
Chimney should
not penetrate
within the
shaded area
600
600
2000
Fig. A
Outlet siting for Oil
Appliances (<45kW)
Fig. B
Outlet siting for Solid Fuel
Appliances (<50kW)
OUTLET SITING FOR OIL APPLIANCES (<45KW)
Location of outlet
Pressure Jet
Burner
Vapourising
Burner
M
Above the highest point of an intersection
with the roof
600mm
1000mm
N
From a structure to the side of the terminal
750mm
2300mm
O
Above a vertical structure which is less than 750mm (pressure jet
burner) or 2300mm (vapourising burner) horizontally from the side
of the terminal
600mm
1000mm
P
From a ridge terminal to a vertical structure on the roof
1500mm
Should not be used
OUTLET SITING FOR SOLID FUEL APPLIANCES (<50KW)
Point where flue passes through weather surface
(Notes 1, 2)
Clearance to flue outlet
A
At or within 600mm of the ridge
At or within 600mm above the ridge
B
Elsewhere on the roof (whether pitched or flat)
At least 2300mm horizontally from the nearest point
on the weather surface and: a) at least 1000mm above
the highest point of intersection of the chimney and the
weather surface; or b) at least as high as the ridge
C
Below (on a pitched roof) or within 2300mm
horizontally to an openable rooflight, dormer
window or other opening (Note 3)
At least 1000mm above the top of the opening
D
Within 2300mm of an adjoining or adjacent
building, whether or not beyond the boundary
(Note 3)
At least 600mm above any part of the adjacent building
within 2300mm
