57Description of the Appliance• The cooker hood is designed to extract unpleasant odours fromthe kitchen, it will not extract steam.• The hood is supplied as an extractor unit and can also be used with arecirculation mode by fitting a charcoal filter.• Only for HI 8610: The cooker hood is supplied ready for use as arecirculation hood and may be used for extraction by removing thecharcoal filter which has been fitted inside the cooker hood.Extraction mode• In this mode fumes are extracted tothe outside via a hose connected tothe coupling ring A. Fig. 1.• In order to obtain the best performancethe hose should have a diameter equalto the outlet hole.For the extractor version this pipemust have a diameter of 150 mm.Should there already be a pipe ofdiameter 125 mm that ducts to theoutside through the walls or roof, it ispossible to use the 150/125 mmreduction flange provided. In this casethe hood will be slightly noisier.Fig. 1ARecirculation mode• The air is filtered through a charcoal filter and returned to thekitchen.• You will need an original charcoal filter for the recirculation mode.(See Special Accessories).