Aislin HE 30 Hang on the wall, modern good looks, latest technology and no chimney required! The aislin high efficiency gas fire provides hang on the wall modern styling, without the requirement for a chimney or flue. All you require is a gas supply and a room of the correct size and ventilation requirements. The minimum room size for this appliance is 30m3 (typically 12' x 12' x 7'6") and 100cm2 of purpose built ventilation. An openable window is also required in the room that the Aislin HE 30 is installed. The aislin is available with a choice of five fascia types: black granite marble, cream coloured micro marble, Silver, Bronzed and Night Sky Black.