| Terminal Position with Minimum Distance (Fig. 17) | (mm) |
Aa | Directly below an opening, air brick, opening |
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Ba | windows, etc. | 300 |
Above an opening, air brick, opening window etc. | 300 | |
Ca | Horizontally to an opening, air brick, opening window etc. | 300 |
D | Below gutters, soil pipes or drain pipes. | 25 |
E | Below eaves. | 25 |
F | Below balconies or car port roof. | 25 |
G | From a vertical drain pipe or soil pipe. | 25 |
H | From an internal (i) or external (ii) corner. | (i) 25 (ii) 115 |
I | Above ground, roof or balcony level. | 300 |
J | From a surface or boundary line facing a terminal. | 600 |
K | From a terminal facing a terminal (Horizontal flue). | 1200 |
| From a terminal facing a terminal (Vertical flue). | 600 |
L | From an opening in carport (e.g. door, window) |
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| into the dwelling. | 1200 |
M | Vertically from a terminal on the same wall. | 1500 |
N | Horizontally from a terminal on the same wall. | 300 |
7.0Site Requirements
7.8Flue
NOTE: Due to the high efficiency of the boiler a plume of water vapour will be discharged from the flue. This should be taken into account when siting the flue terminal.
1.The following guidelines indicate the general requirements for siting balanced flue terminals.
For GB recommendations are given in BS 5440 Pt.1.
For IE recommendations are given in the current edition of I.S.
813“Domestic Gas Installations”.
2.If the terminal discharges onto a pathway or passageway, check that combustion products will not cause a nuisance and that the terminal will not obstruct the passageway.
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| 3. When siting the flue take into consideration the effect the | |
R | From adjacent wall to flue (vertical only). | 300 |
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S | From an adjacent opening window (vertical only). | 1000 |
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T | Adjacent to windows or openings on pitched and flat roofs | 600 |
| 4. Adjacent surfaces close to the flue terminal may need | |||||||||||||||||||||||
U | Below windows or openings on pitched roofs | 2000 |
| protection from the effects of condensation. Alternatively a flue | |||||||||||||||||||||||
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| deflector kit (part no. 248167) is available. | |
Table. 2 |
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a | In addition, the terminal should be no nearer than 150 mm to an |
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opening in the building fabric formed for the purpose of accommodating |
| 25mm dimension the flue plume deflector kit (part no. 248167) | |||||||||||||||||||||||||
a |
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NOTE: The distance from a fanned draught boiler terminal |
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installed parallel to a boundary may not be less than 300mm* |
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in accordance with the diagram below, unless the flue deflector |
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| 7. If a terminal is less than 2 metres above a balcony, above | ||||||||||||||||||||||||
kit is used (see 7.8.6 opposite) |
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| ground or above a flat roof to which people have access, then | |||||||||||||||||||
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| 300 min |
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| Terminal |
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| Assembly |
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| 8. If required a suitable terminal guard (part no. 248484) is | |
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| available from Potterton for use with the flue deflector. See | |
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| also Section 8.8. | |
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| 9. For fitting under low soffits and eaves the Plume | |
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| Displacement Kit or Flue Deflector Kit is recommended. | |
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| Top View Rear Flue |
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| IMPORTANT: |
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Fig. 16a |
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| • Only ONE 25mm clearance is allowed per installation. |
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| • Under car ports we recommend the use of the plume |
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| Property Boundary Line |
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| • The terminal position must ensure the safe and |
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| nuisance - free dispersal of combustion products. |
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| IMPORTANT: If fitting a Plume |
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| Displacement Flue Kit, the air inlet |
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| T |
| must be a minimum of 150mm from |
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| J,K |
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| Plume | ||
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| Displacement Kit |
R N
M
I I
F B
L
A
G
I
Likely flue positions requiring a flue terminal guard
© Baxi Heating UK Ltd 2011
C | D | A |
E |
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I | S | I |
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| F | J,K |
| A |
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H | H |
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Fig. 17
Air Inlet
| 150mm |
Fig. 17a | MIN. |
Opening Window or Door
19