[. . . ] If the extractor is used in conjunction with non-electrical appliances (e. Gas burning appliances), a sufficient degree of aeration must be guaranteed in the room in order to prevent the backflow of exhaust gas. The kitchen must have an opening communicating directly with the open air in order to guarantee the entry of clean air. [. . . ] uSE · The extractor hood has been designed exclusively for domestic use to eliminate kitchen smells. Never use the hood for purposes other than for which it has ben designed. Never leave high naked flames under the hood when it is in operation. Adjust the flame intensity to direct it onto the bottom of the pan only, making sure that it does not engulf the sides. Deep fat fryers must be continuously monitored during use: overheated oil can burst into flames. Do not flambè under the range hood; risk of fire · The hood should not be used by children or persons not instructed in its correct use. mAINTENANCE · Switch off or unplug the appliance from the mains supply before carrying out any maintenance work. Maximum speed, used for eliminating the highest cooking vapour emission, including long periods. Low speed, used for a continuous and silent air change in the presence of light cooking vapour. Medium speed, suitable for most operating conditions given the optimum treated air flow/noise level ratio. The filters must be cleaned every 2 months, or more frequently in case of particularly heavy use of the hood. (The colour of the filter surface may change throughout the time but this has no influence to the filter efficiency). When refitting the filters, make sure that the handle is visible on the outside. These filters are not washable and cannot be regenerated, and must be replaced approximately every four months or more frequently by particularly heavy use. [. . . ] These filters are not washable and cannot be regenerated, and must be replaced approximately every four months or more frequently by particularly heavy use. Unscrew the bulbs and replace them with new ones having the same characteristics. The symbol on the product or on its packaging indicates that this product may not be treated as household waste. [. . . ]