| 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
manufacturers
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.
