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13 flUe teRMinAtion PoSition
A.
Below an opening (1)
B.
Above an opening (1)
C.
Horizontally to an opening (1)
D.
Below gutters, soil pipes or drain pipes
E.
Below eves
F.
Below balcony or car port roof
G.
From a vertical drain pipe or soil pipe
H.
From an internal or external corner or to a boundary alongside the terminal
I.
Above ground, roof or balcony level
J.
From a surface or a boundary facing the terminal
K.
From a terminal facing the terminal
L.
From an opening in the car port into the building
M.
Vertically from a terminal on the same wall
N.
Horizontally from a terminal on the same wall
(1)
An opening here means an openable element, such as a openable window, or a fixed opening such as an air vent. However, in addition, the outlet should not
be nearer than 150mm (fanned draught) to an opening into the building fabric formed for the purpose of accommodating a built in element, such as a window frame.
The dimensions given in the table above may need to be increased to avoid wall staining and nuisance depending on site conditions.
boundary
GeneRAl inStAllAtionS
All parts of the system must be constructed in accordance with BS 5440 Part 1, except where specifically mentioned in these
instructions.
All pipe work must be adequately supported.
Marley muPVC (PVC-C) Solvent Weld Waste System (50mm) and Polypipe System 2000 muPVC (PVC-C) solvent weld waste
(50mm) are the only systems approved for this application.
Consideration must be given to Gas Safe Register bulletin TB008 regarding flues in voids and inspection hatches.
The boiler casing must always be correctly fitted to the boiler when leaving the appliance operational.
External wall faces and any internal faces of cavity walls must be good.
Rubber collars are available for flue and air terminals to finish the external wall face around the terminals (Part No C.08.00.07.0).
AiR SUPPly
The Keston Heat is a room-sealed appliance and therefore does not require purpose provided ventilation to the boiler room for
combustion air.
Keston Heat -
Installation & Servicing
INSTALLATION
Twin Flue Positions
I
H
F
J
L
G
boundary
Flue Minimum Spacing
300 mm
300 mm
300 mm
75 mm
200 mm
200 mm
150 mm
300 mm
300 mm
600 mm
1200 mm
1200 mm
1500 mm
300 mm
D, E
B
C
A
H
M
H
I
Air Minimum Spacing
12"
50 mm
12"
50 mm
12"
50 mm
3"
75 mm
8"
50 mm
8"
50 mm
6"
50 mm
12"
50 mm
12"
100 mm
24"
100 mm
48"
1200 mm
48"
48"
100 mm
60"
1500 mm
60"
12"
300 mm
12"
N
K
2"
2"
2"
3"
2"
2"
2"
2"
4"
4"
4"
19
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