GC1 terminal?

[Marcus100]

Hi, can anyone advise me on a terminal for my inset living flame effect gas fire that I'm due to get fitted next week.I have a chimney with a 200mm concrete liner going up through it.The fireplace used to have a backboiler and flueliner in it, which has now been removed.
I had a corgi gas fitter around today to give me a price to undertake the job and he suggested getting the chimney swept and fitting a 125mm gc1 terminal on top of the chimney.
Just concerned that if you have a 200mm concrete fluepipe up the chimney and then fit a 125mm terminal on top that it would cause a build up of fumes.

 

[pannierstan]

If the flue is larger than 170mm I am not sure it needs one but you might want to put a bird guard on it.
Will have to have a look in the bible

 

[Marcus100]

If the flue is larger than 170mm I am not sure it needs one but you might want to put a bird guard on it.
Will have to have a look in the bible

Thanks for replying, so I take it it is illegal to fit this type of terminal on this type of chimney to use with this type of fire

 

[cross thread]

for most fires a 123mm gc1 is correct unless the manu say diff

 

[pannierstan]

Thanks for replying, so I take it it is illegal to fit this type of terminal on this type of chimney to use with this type of fire[/quote]

No if you want a GC terminal you will need one that does not restrict the original diameter but I am unsure if you can get a 200mm GC1