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Hi guys,
I think I know what I need to do but wanted to double check...
We removed an old 1970s gas fire from a fireplace, there's a stainless steel flu liner up the chimney approx 13cm diameter (from reading online its likely to be the 125mm flu ?)
I cut the flu end off so it ends higher up the chimney throat for smoke to enter it from the firegrate we put in the opening.
I also used a chimney sweep brush and cleaned it through to the top of chimney - no obstructions , not much dirt - went out top of chimney could see the brush outside .
Padded the flu around the end with rockwool to get it centre and stop smoke going up outside of flu.
Did a quick test seemed to be ok for 10 mins, then smoke backed up into the room - badly!.....
I thought it might be smoke building up around the flu entry as the rock wool was not flush with the mouth of flu.
I used an old garden incinerator bin lid with the chimney part - cut it square with angle grinder into a chimney throat , used fire cement to get it in place and create a nice sealed feed upto the liner mouth.
Did another tested, same thing happened after approx 10 mins smoke fills room.
I now suspect the chimney liner 13cm/125mm? diameter is not big enough for a solid fuel fire?
The actual chimney diameter of the brick flu seems to be at least double that.
The opening in the chimney breast has been altered in the past - reduced in size - its quite small 55cm h x 64cm w
I think I need to remove the flu liner completely? is this cemented on at the top of the chimney - I take it I cant remove it from ground level? - (the chimney is above two angled single story roofs a right pain to get to!)
I think I know what I need to do but wanted to double check...
We removed an old 1970s gas fire from a fireplace, there's a stainless steel flu liner up the chimney approx 13cm diameter (from reading online its likely to be the 125mm flu ?)
I cut the flu end off so it ends higher up the chimney throat for smoke to enter it from the firegrate we put in the opening.
I also used a chimney sweep brush and cleaned it through to the top of chimney - no obstructions , not much dirt - went out top of chimney could see the brush outside .
Padded the flu around the end with rockwool to get it centre and stop smoke going up outside of flu.
Did a quick test seemed to be ok for 10 mins, then smoke backed up into the room - badly!.....
I thought it might be smoke building up around the flu entry as the rock wool was not flush with the mouth of flu.
I used an old garden incinerator bin lid with the chimney part - cut it square with angle grinder into a chimney throat , used fire cement to get it in place and create a nice sealed feed upto the liner mouth.
Did another tested, same thing happened after approx 10 mins smoke fills room.
I now suspect the chimney liner 13cm/125mm? diameter is not big enough for a solid fuel fire?
The actual chimney diameter of the brick flu seems to be at least double that.
The opening in the chimney breast has been altered in the past - reduced in size - its quite small 55cm h x 64cm w
I think I need to remove the flu liner completely? is this cemented on at the top of the chimney - I take it I cant remove it from ground level? - (the chimney is above two angled single story roofs a right pain to get to!)