Miele DA 399-7 Betriebs- und Installationsanleitung - Seite 9

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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 cooker hood 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

cross-section 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, ask a competent building regulations

inspector or qualified gas fitter (if appropriate).

If the cooker hood is being operated in recirculation mode,

whereby the air is redirected into the room in which it is installed,

the above restrictions do not apply.