Class 1 Flue
Fuel Types: Solid Fuel - Natural Gas -LPG - Electric
Common in older houses earlier than 1960. The Class 1 Chimney is identifiable by the traditional chimney stack built from brick or stone and has a flue diameter of 7 inches(180cm) or greater. The existing chimney must be structurally sound. With this type of chimney all fire options are available.
Class 2 Flue
Fuel Types: Natural Gas – LPG - Electric
This type of flue can be found on newer houses, or where an existing class 1 chimney has been relined with a proprietary steel flue liner. This flue is 5 inches (130cm) in diameter and is capped of with a steel flue terminal.
Pre-Cast Flue
Fuel Types: Natural Gas – LPG - Electric
Modern Houses in the most later than 1960 will often have a precast concrete chimney system. This is identifiable by the rectangular box section flue and terminal on the ridge tiles, as illustrated in the picture
No Chimney
Power Flue or Balanced Flue Required
Fuel Types: Natural Gas – LPG – Electric
Modern houses often have no chimney. You may either install an electric fire or opt for a balanced flue or powerflue system. The powerflue must be installed on an outside wall unless a side venting option is chosen.The powerflue has the look of a traditional gas fire. There must be an electric supply near to the fire. The balanced flue does not require electric but the flames are behind glass.
The heat source that you can have with your fireplace is dependent on the type of chimney that you have. The illustrations above show the types of chimney together with the heat sources that you can use.
