Hi,

Have spent some time with google groups trying to find a definitive answer
but still not sure...

I need to install a liner into an old stone chimney but have had conflicting
advice on what's required. It's for a decorative flame effect gas fire,
house is stone built around 1920. The chimney looks to be about 12-14"
diameter, when doing a smoke test smoke appeared in one of the upstairs
rooms through the open fireplace, hence my need for a flexible liner.

Some say a standard 7" liner will be fine, others indicate 6" or 7" twin
wall liner is required. Doing on the job on a tight budget, but safety is of
course important. The instructions mention a 7" flue liner should be used
but don't mention twin wall, although a diagram of a Class 1 chimney is
shown. The appliance is described as 'For decorative effect only'
manufactured to current issue of EN 509.

Can anyone offer any advise please?

Many Thanks
Mike