- 22 -
INST
ALLA
TION
- 22 -
INST
ALLA
TION
GENERAL REQUIREMENTS
stalled in a room containing a bath or
shower, any electrical switch or appliance
control, utilising mains electricity should
be so situated that it cannot be touched by
a person using the bath or shower.
The location must permit the provision of an
adequate flue and termination.
For unusual locations special procedures
may be necessary and BS 6798 gives de-
tailed guidance on this aspect.
A compartment used to enclose the appliance
must be designed specifically for this pur-
pose. This appliance is not suitable for exter-
nal installation.
5.3 Flue system
The provision for satisfactory flue termination
must be made as described in BS 5440 part
1. For Ireland (IE), refer to I.S.813.2002.
The appliance must be installed so that the
flue terminal is exposed to external air.
It must not be installed so that the terminal
discharges into an other room or space as an
outhouse or lean-to. It is important that the
position of the terminal allows a free passage
of air across at all times.
The terminal should be located with due re-
gard for the damage or discoloration that
might occur to building products in the vicini-
ty. In cold and/or humid weather water vapour
may condense on leaving the flue terminal;
the effect of such ”steaming” must be consid-
ered.
Pluming may easily occur at the terminal.
Where possible, terminal position which could
cause a nuisance should be avoided.
The minimum acceptable spacing from the
terminal to obstructions and ventilation open-
ings are specified in Fig. 5.1.
Fig. 5.1
A
BC
E
F
G
I
JK
L
M
N
H
I
O
P
Q
D
I
I
I
Terminal position
mm
A
Directly below the window or
other opening
300
B
Below gutters, soil pipes or drain pipes 75
C
Below eaves
200
D
Below balconies*
600
E
Below car port roof
NO
F
From vertical drain pipes and soil pipes
150
G
From internal corners**
450
H
From external corners
300
I
Above ground or balcony level***
300
J
From a next door boundary
2500
k
From a terminal facing a terminal 2500
L
From an opening in the car port
(e.g. door, window) into dwelling
NO
M
Vertically from a terminal in the
same wall
1500
N
Horizontally from a terminal in the
same wall
300
O
Above the roof pitch with roof slope less
than or equal to 30°
350
O
Above the roof pitch with roof slope
more than 30°
600
P
From wall face
300
Q
From, above or to side of an opening 600
* Wherever practicable to do so, the flue
should be extended beyond the perimeter