Your choice of fire will be dictated by the type of chimney or flue in your home. If you are not sure then take a look at your roof and cross-reference it with the simple guide below. Don’t worry if you don’t have a fixed flue, there are many gas fires that are available as a Powerflue or balanced flue model and a fantastic range of electric fires.


Brick Chimney

Brick Chimney

 A conventional brick chimney is recognisable by a chimney stack with a terracotta pot or gas terminal.

 Class 1 Flue

                   A Class 1 Flue is easily recognised by a conventional brick chimney with chimney stack on the roof. This relies on the natural ´pull´ to expel the products of combustion out of the        chimney pot. The minimum internal diameter for class 1 is 180mm. This allows you to have most types of fires.
Occasionally, a flue liner may have been used to rectify a leak. If this is the case the liner needs to have a minimum internal diameter of 180mm. If the liner has an internal dimension is only 127mm the chimney becomes Class 2.

Balanced Flue ImformationBalanced Flue

 Balanced Flue fires vent directly outside through a horizontal co-axial pipe (one pipe within a larger pipe). The outer pipe draws air in from the outside and the inner pipe expels combustion gases.

Pre-Fabricated Flue ImformationPre-Fabricated Flue

 This is an interlocking metal flue tube system, identifiable by a metal flue and terminal on the roof and a metal flue box behind the fire.

 Class 2 Pre-Fabricated Flue

                    A Class 2 Pre-Fabricated Flue is a metal flue box that is situated behind the fire connecting to a series of metal flue pipes running up through the house terminating with a pipe and terminal through the roof. The internal diameter of the pipe is 127mm. There are a large number of fires available for this situation. Occasionally, the flue may have been constructed using 180mm pipe. If this is the case, the flue is classed as Class 1.

Pre-Cast Flue ImformationPre-Cast Flue

 Built from concrete or clay blocks, pre-cast flues provide a rectangular section flue. They can be identified by a ridge vent or metal flue tube and terminal on the roof.

 Class 2 Pre-Cast Flues

                   Class 2 Pre-Cast Flue are commonly found in more modern homes. Constructed using hollow concrete flue blocks which create a flue up through the property usually terminating with a ridge vent on the roof. In most cases there is usually a flat wall where ther fire goes. This does limit slightly the choice of fires suitable as depth can be an issue.

Power Flue ImformationPowerflue

 Powerflue fires expel the combustion gases directly outside the building through the use of an electronically driven fan unit mounted on the external wall. A sophisticated microprocessor monitors performance and automatically shuts off the fire in the unlikely event of a failure.

No Chimney or Flue ImformationNo Chimney or Flue

 If you do not have a chimney/flue and do not want to install a balanced flue or Powerflue product then an electric fire may be the best option for you.