INSTALLATION
SECTION 3
27
The following notes are intended to give guidance:
Where the heater is to be installed in a room, NO VENTS ARE REQ UIRED.
Where the heater is to be installed in a
COMPARTMENT
, permanent air vents are
required in the
COMPARTMENT
at high and low level. These air vents must either
communicate with a room or internal space or be direct to outside air.
The minimum effective areas of the permanent air vents required in the compartment are
as follows:
Air Vents Areas
Position of Air V ents
Air from Room or Internal Space
Air Direct from Outside
High Level
10cm
2
per kW Net input
5cm
2
per kW Net input
Low Level
10cm
2
per kW Net input
5cm
2
per kW Net input
In a Room or
No Requirement for Ventilation
Internal Space
Note: - Both air vents must communicate w ith th e same room or internal space or
must b oth b e on th e same w all to outside air.
Air vents should have negligible resistance and must not be sited in any position where
they are likely to be easily blocked or flooded or in any position adjacent to an extraction
system which is carrying flammable vapour.
Consideration must be given to the position of the high level ventilation opening. A high
level vent must not be sited within 300mm (1ft) measured vertically, of the flue terminal.
Grilles and louvres should be so designed that high velocity air streams do not occur
within the space housing the heater(s).
AIR SUPPLY
AND
VENTILATION
CONCENTRIC
FLUE SY STEMS
MAXXflo_Manual_Dec08_QX2 12/1/09 1:13 pm Page 30
Summary of Contents for CWH120/200
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