This Gazco gas fire is part of a sitting room, with a balanced flue fitting through the cavity wall. Other options for gas fires include traditional fireplaces with a chimney, or alternatively, you can consider pre-fabricated flues, pre-cast flues, powered flues (for fires not against an external wall), and no vent at all. Flueless fires generally come with catalytic converters or similar, helping the flames to burn more cleanly, although an air vent in the room is a requirement.
