| Distance |
Location |
Minimum separation distances for terminals (mm) |
| Balanced flue |
Open flue |
| Natural draught |
Fanned draught |
Natural draught |
Fanned draught |
| A |
Below an opening (1) |
Appliance rated
heat input (net)
0 – 7 kW:
>7 – 14 kW:
>14 to 32 kW:
> 32kW: |
300
600
1500
2000 |
300 |
Not to be used |
300 |
| B |
Above an opening (1) |
0 – 32 kW:
>32kW: |
300
600 |
300 |
Not to be used |
300 |
| C |
Horizontally to an opening (1) |
0 – 7 kW:
>7 – 14kW:
> 14kW: |
300
400
600 |
300
|
Not to be used |
300 |
| D |
Below gutters, soil pipes or drains. |
300 |
75 |
Not to be used |
75 |
| E |
Below eaves |
300 |
200 |
Not to be used |
200 |
| F |
Below balcony or car park roof |
600 |
200 |
Not to be used |
200 |
| G |
From a vertical drain or soil pipe |
300 |
150 (3) |
Not to be used |
150 |
| H |
From an internal or external corner
or to a boundary alongside the
terminal (2) |
600 |
300 |
Not to be used |
200 |
| I |
Above ground, roof or balcony
level |
300 |
300 |
Not to be used |
300 |
| J |
Above ground, roof or balcony
level |
600 |
600 |
Not to be used |
600 |
| K |
From a terminal facing the terminal |
600 |
1200 |
Not to be used |
1200 |
| L |
From an opening in the car port
into a building |
1200 |
1200 |
Not to be used |
1200 |
| M |
Vertically from a terminal on the
same wall |
1500 |
1500 |
Not to be used |
1500 |
| N |
Horizontally from a terminal on the
same wall |
300 |
300 |
Not to be used |
300 |
| O |
From the wall on which the
terminal is mounted |
Not applicable |
Not applicable |
Not applicable |
50 |
| P |
From a vertical structure on the
roof |
Not applicable |
Not applicable |
1500 if a ridge
terminal. For any
other terminal as
per BE 5440 – 1:
2000 |
Not applicable |
| Q |
Above the highest point of
intersection with the roof |
Not applicable |
Site in
accordance with
manufacturer’s
instructions |
Site in accordance
with BS 5440 – 1:
2000 |
150 |
- An opening here means an openable element, such as an openable window, or a fixed opening such as a vent. However, in
addition, the outlet shall not be nearer than 150 mm (fanned draught) or 300 mm (natural draught) to an opening into the building
fabric formed for the purpose of accommodating a built in element, such as a window frame.
- Smaller separations to the boundary may be acceptable for appliances that have been shown to operate safely with such
separations from surfaces adjacent to or opposite the flue outlet.
- This dimension may be reduced to 75 mm for an appliance with an input (net) not greater than 5 kW.
|
Please check with your local building control department before using information contained in this page to ensure that they comply with your local building codes.
