During cooking, and in particular when frying, vapours are given off which consist of a mixture of steam, particles of fat and odours. If air in the room is not extracted or filtered, these vapours will remain in the room and affect the kitchen environment. Over a period of time this will affect the kitchen furniture, soft furnishings, paintwork etc. as this is where grease and vapours settle. There are three options for cleaning the air effectively: air extraction, air extraction in combination with an external motor and recirculation mode. All three methods have their advantages and disadvantages. Which one suits you best will depend on a number of factors that are explained in a separate section.