Miele SmartLine Operating And Installation Instructions page 12

Downdraft extractor

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Warning and Safety instructions

In order to ensure safe operation and to prevent gases given off by

the heating appliance from being drawn back into the room, when

the downdraft extractor and the heater are both operated

simultaneously, an underpressure in the room of 0.04 mbar (4 Pa)

is the maximum permissible.

Sufficient ventilation can be maintained by air inlets which cannot

be blocked, e.g. in windows, doors and outside wall vents. The

diameter of the inlet openings must enable sufficient ventilation. A

ventilation brick alone is not generally sufficient to ensure safe

ventilation.

The overall ventilation condition of the dwelling must be taken into

account. If in any doubt, the advice of a competent builder, or for

gas, a qualified gas fitter should be sought.

If the downdraft extractor is being operated in recirculation mode,

where the air is directed back into the room in which it is located,

operating a heating appliance which depends on the room air at

the same time is not hazardous.

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