Minimum dimensions of flue terminal positions

Terminal position

Balance flues

room sealed

Open flues

Natural

draught

Fanned

draught

Natural

draught

Fanned draught

A

* Directly below an opening, airbrick, window etc.

0-7kW

>7-14kW

>14-32kW

>32-70kW

300 mm

600 mm

1500 mm

2000 mm

300 mm

Not allowed

300 mm

B

* Above an opening, airbrick, window etc.

0-7kW

>7-14kW

>14-32kW

>32-70kW

300 mm

300 mm

300 mm

300 mm

300 mm

Not allowed

300 mm

C

* Horizontally to an opening, airbrick, window etc.

0-7kW

>7-14kW

>14-32kW

>32-70kW

300 mm

400 mm

600 mm

600 mm

300 mm

Not allowed

300 mm

D

Below a gutter or sanitary pipe if combustible material protected.

300 mm

75 mm

Not allowed

75 mm

E

Below eaves.

300 mm

200 mm

Not allowed

200 mm

F

Below balconies or open roofed out buildings.

600 mm

200 mm

Not allowed

200 mm

G

From a vertical drain or soil pipe.

300 mm

150 mm

Not allowed

150 mm

H

From an internal or external corner.

600 mm

300 mm

Not allowed

200 mm

I

Above ground or balcony level.

300 mm

300 mm

Not allowed

300 mm

J

From a surface facing the terminal.

600 mm

600 mm

N/A

600 mm

K

From another terminal facing the terminal.

600 mm

1200 mm

N/A

1200 mm

L

From an opening in the car port into a dwelling.

1200 mm

1200 mm

N/A

1200 mm

M

Vertically from a terminal on the same wall.

1500 mm

1500 mm

N/A

1500 mm

N

Horizontally from a terminal on the same wall.

300 mm

300 mm

N/A

300 mm

O

From a wall on which the terminal is mounted.

N/A

N/A

N/A

50 mm

P

From a vertical structure on the roof.

N/A

N/A

600 mm

N/A

Q

Above intersection with roof.

N/A

N/A

600 mm

150 mm