Recent technological advancements have allowed manufacturers to achieve 100% efficient gas fires without the need for a chimney or flue. Rooms that previously would have been deemed as impossible to fit a working gas fire in, can now be enhanced by a wide selection of these elegant Flueless fires. Gas consumption is lower and output higher than any other type of gas fire previously marketed, making them cheaper and greener to run. All these fires require an air vent and a minimum room size, 30m³ – 50m³, depending on the appliance. A room of 30m³ would be approximately 11’6” x 11’6” x 8’2” or 3.5m x 3.5m x 2.5m.