Section 9: Ventilation Requirements
Where the heater is to be installed in a plant room, the heater requires the plant room
housing to have permanent air vents communicating directly with the outside air, at a
high level and at a low level. Where communication with the outside air is possible
only by means of high level air vents, ducting down to floor level for the lower
vent(s) should be used. 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.
Grilles or louvers should be designed so that high velocity air streams do not occur
within the plant room.
The ventilation should be installed to in accordance with local and national codes.
Ventilation Requirements:
The space in which the heater is situated must be adequately ventilated, see below for
the minimum ventilation area at low and high levels.
Low Level:
540cm² plus 4.5cm² per kW after 60kw.
High Level:
270cm² plus 2.25cm² per kW after 60kw
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