[. . . ] -- When the hood is used at the same time of other appliances that run on energy sources other than electricity, provision must be made for an adequate supply of air. The use of an unprotected flame is dangerous for the filters and could cause fires. [. . . ] When frying foods, never leave the pan alone because the cooking oil could flare up. -- Please , keep to the provisions of official directives regarding the question of fume discharge. -- The manufacturers refuse to accept any responsibility for damage to the hood or its catching on fire because of failure to observe the above instructions. The hood may be used as follows: The air is conveyed out through a pipe which is connected to the outlet hole A (fig. The air must be vented out by means of a pipe with an internal diameter of 120mm. -- The air is purified through an active carbon filter and returned to the room. -- The use of 2 active carbon filters are necessary when an exhaust pipe to the exterior is not available, or when it is not possible to install this type of pipe. -- This appliance is designed for fitting in a cabinet or some other support. -- The opening to be made on the bottom of the wall-hung cabinet must correspond with the measurements shown in fig. C) Secure the unit to the cabinet by screwing up screws through holes F (fig. It keeps the odours and smells and leave the aspirated air cleaned from them. The power is adjusted by means of an electronic sliding switch, plus an intensive set located at the end of the switch run. For the best performance, we recommend using the low speeds in normal conditions and the high speeds in particular cases of strong odour and vapour concentration. We recommend starting up the hood a few minutes before cooking and keeping it running until all the odours have been eliminated. [. . . ] We recommend starting up the hood a few minutes before cooking and keeping it running until all the odours have been eliminated. Failure to observe the rules for cleaning the appliance and changing and cleaning the filters may cause fires. [. . . ]