Baxi Potterton 21 SL Service Manual download pdf (Page 16)

7.0 SYSTEM REQUIREMENTS

7.6 Flue

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.

3. If a terminal is less than 2 metres above a balcony,

above ground or above a flat roof to which people

have access, then a suitable terminal guard must be

provided.

Terminal Position with Minimum Distance (Fig. 16) (mm)

A* Directly below an openable window, air vent or any other

ventilation opening. 300

B Below gutters, drain/soil pipe. 25

C Below eaves. 25

D Below balcony/car port roof. 25

E From vertical drain pipes and soil pipes. 25

F From internal or external corners. 25

G Above adjacent ground or balcony level. 300

H From a surface or boundary facing the terminal. 600

I Facing terminals. 1200

J For opening (door/window) in car port into dwelling. 1200

K Vertically from a terminal on the same wall. 1500

L Horizontally from a terminal on the same wall. 300

M* Above an opening, air brick, opening window etc. 300

N* Horizontally to an opening, air brick, opening window etc. 300

Fig. 16

H,I

B,C

Likely flue positions requiring

a flue terminal guard

300 min

Terminal

Assembly

Top View Rear Flue

Property Boundary Line

* In addition, the terminal should be no nearer than 150mm to an

opening in the building fabric formed for the purpose of

accommodating a built-in element such as a window frame. See

BS 5440 Pt. 1.

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Baxi Potterton 21 SL Service Manual Page 16

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