more information www.bosch-home.com.au | 57 CleanAir module Accessory to be purchased separately* * Available for selected Bosch rangehoods Ducted extraction Recirculation kit Ducting out is the most effective method of extraction. IdeallyOdours are extracted and filtered, then purified air is returned the rangehood should be sited on an outside wall, or anto the room. The kit comprises of a carbon filter and all outside wall can be reached via ducting. All Bosch extractorscomponents needed to ensure that odour free air is returned are now standardised to facilitate a 150mm diameter outlet forinto the kitchen. To maintain performance, the carbon filter maximum performance, although smaller ducting can be usedshould be replaced on a regular basis. A recirculation kit if required. Please refer to the installation guide for furtherneeds to be purchased as a separate accessory. advice on best practice installation. What extraction rate do I need? It is recommended that air be extracted (or exchanged) in a room depending on your type of cooking: a minimum of 6 times per hour; and a maximum of 12 times per hour. Air extraction is measured using room volume. This is calculated by multiplying Length x Width x Height. L x W x H 240m³ x 6 times / hour necessary air extraction 2.5m rate at normal use height (simmering on 2–3 hotplates) = 40m³ 4m 4m 480m³ width length necessary air extraction x 12 times / hour rate at intensive use (eg. strong frying activities) Bosch extraction rates are tested in line with EU standards. See page 98 for more information.