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Extraction mode or recirculation mode?
What is the difference between extraction and recirculation
modes?
To get optimum performance from your cooker, the air will be taken
out of the room via external ducting.
Unfortunately if you live in a flat or the hood is too far from an outside
wall, this may not be possible. The only alternative is to recirculate the
air.
In recirculation mode stale air is taken via the grease filter, and passed
through a charcoal filter for purification. The air then re-enters the
kitchen via an opening in the hood
.
What is a charcoal filter and do I need one?
All cooker hoods have a grease filter but if you are using your cooker
hood in recirculation mode, then a charcoal filter must be fitted in
addition to the grease filter.