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In order to ensure safe operation, and

to prevent gases given off by the

heating appliances from being drawn

back into the room when the cooker

hood and the heating appliance are in

operation simultaneously, an

underpressure in the room of 0.04 mbar

(4 pa) is the maximum permissible.

Ventilation can be maintained by air

inlets which cannot be blocked, in

windows, doors and outside wall vents,

or by other technical measures, such

as ensuring that the cooker hood can

only be switched on when the heating

appliance is switched off or vice versa.

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 (GasSafe

registered in the UK) or electrician

must be sought.

If the hood is being operated in

recirculation mode, the above

restrictions do not apply.

Warning and Safety instructions