This is the amount of heat a gas stove or fire can produce per hour expressed in Kilowatts (kW). As a rough guide 2 kWs is equivalent to the heat output of one double radiator.
This is the wide band of heat a good quality gas fire can produce, As a guide a fire rated at 6 kW might produce between 2 and 6 kWs depending on the amount of fuel and air used.
This is a calculation taking into account the room size, insulation values, heat losses and the home owners lifestyle requirements, to arrive at the correct size of gas fire for a room.
If your house is not connected to mains natural gas, then it's still possible to have a gas fire or stove installed by using liquid petroleum gas (LPG) in a bottle or tank.
This is a vent in the wall or floor that ensures enough air enters the room to allow complete combustion in the fire. Applies to gas stoves and fires with a nominal output of 7 kWs plus.
This is the official body recognised by the Government to approve the installation of gas stoves and fires in the UK. It registers, trains and checks approved gas installers.