Inset gas fire depth

[gjacques]

Hello,

I have an inset gas fire that i want fitted to a pre-cast flue system. The fire chosen has a minumum depth required of 120mm, without the fire surround back in place the depth is only 100mm but with the stone fire surround back in place it will bring the depth to 175mm. Is it ok to use the surround back to bring the fire out more???

Thanks

 

[Gasguru]

Yes since the surround will be sealed to the flue blocks.

Your installer will also check the flue cross sectional area, catchment space volume (volume below the flue spigot), distance from flue spigot to the rear blockwork and the minimum throat dimension with the manufacturers dimensions. The terminal must also be of the correct type if required.

 

[giblets]

What do the installation instructions say about fiting to a pre-cast flue? Some can't be fitted.

 

[Gasguru]

I don't know - read the manual - some flue block systems were next to useless and were so badly installed they are unusable. Often the joints were badly sealed.

 

[gjacques]

Hi,

Its a flavel windsor pebble gas fire (slimline). It says its ok for a pre-cast flue, i was just worried about the fire depth. If i bring it out to leave a 175mm gap at the back and the minimum is 120mm will i be coming out too far. After all its 50mm more than the minimum depth recommended.

 

[DP]

Why not get a Gas fire registered installer to fit the fire for you. While you might be able to fit the fire, do you think you will be able to commission the fire, check the chimney and verify the burner pressure along with spillage check?

I see plenty fires diyed, that needed remedial work carried out making the orignal saving nonexistant. Think safe, use someone who has proven track record.