The Keston Qudos 28h and Qudos 28hP, as with any condensing boiler, will
generate a condensate “plume” from the flue terminal in all weather conditions.
Consideration must therefore be given to the effect of this “plume” when selecting
a location for the flue terminal. It is the responsibility of the installer to ensure the
selected terminal location does not cause nuisance.
300
300
L Horizontally from terminal on same wall.
1,500
1,500
K Vertically from terminal on same wall.
100
1,200
J From opening in a car port.(not recommended)
1,200
1,200
I
From terminal facing a terminal.
100
600
H From surface or boundary facing a terminal *
100
200
G Above ground or balcony or roof.
50
200
F From internal or external corner or to a
boundary alongside the terminal. *.
50
75
E From vertical drain or soil pipes.
50
200
D Below balconies or car port roof (lowest point).
50
200
C Below eaves.
75
75
B Below gutters, soil pipes, drain pipes.
50
300
A Below, above or beside openable window, air
brick, etc.
Air
Inlet
Flue
Terminal
Dimensions (mm)
*The dimensions given in the table above may need to be increased to avoid wall
staining and nuisance depending on site conditions.
It is advisable for horizontal flue terminals to place a 45
o
elbow at the end of the
flue to direct the condensate plume up and away from the property. If the air
intake is within 500mm of the flue outlet the air must not terminate at a level
above that of the flue
If either the air inlet or flue outlet terminate at a height of less than 2.1m above
ground level, the terminal must be protected by a suitable guard. The K4 terminal
guard (with plastic coating), manufactured by Tower Flue Components Ltd is
suitable for this purpose
3.8.5
Clearances From Wall
Flue outlet and air inlet terminations must be at least 40 mm from the wall face.
3.8.6
Distance Between Flue Outlet & Air Inlet
There is no maximum - the terminations must not be on opposite sides of the
dwelling but can be in areas of unequal pressure.
A minimum clearance of at least 200 mm must be left between the terminations.
3.8.7
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.
All joints other than approved push-on or plastic compression connectors must be
made and sealed with solvent cement suitable for muPVC pipes and conforming
to BS 6209: 1982.
External wall faces and any internal faces of cavity walls must be made good.
Rubber collars are available for flue and air terminals to finish the external wall
face around the terminals
(Part No C.08.0.00.07.0)
3.9
AIR SUPPLY
The KESTON Qudos 28h and Qudos 28hP are room sealed appliances and therefore do
not require purpose provided ventilation to the boiler room for combustion air.
WD440/3/2007
Chapter 3 - Boiler Location
The Keston Qudos 28h & Qudos 28hP Boilers
Installation & Servicing Instructions
Page : 19
