Stove / blocking Chimney

Animord

Sorry if this isn't the right forum.

I have a cottage with a very big chimney - it has a huge fire place and the whole chimney is completely open - (I could stand up inside if if I didn't mind being filthy!) Anyway, I want to put a stove in as I lose so much heat up the chimney I may as well pour the oil from the current central heating away. What I was wondering is how do you block the chimney, as it were? The stove would sit in on the old hearth and the flue presumably will go up the existing chimney, but how does the flue get fixed to the sides and how do I block the chimney to stop all my precious heat from disappearing?

I hope this question makes sense!:)

Stove Fan

Animord wrote: »

Sorry if this isn't the right forum.

I have a cottage with a very big chimney - it has a huge fire place and the whole chimney is completely open - (I could stand up inside if if I didn't mind being filthy!) Anyway, I want to put a stove in as I lose so much heat up the chimney I may as well pour the oil from the current central heating away. What I was wondering is how do you block the chimney, as it were? The stove would sit in on the old hearth and the flue presumably will go up the existing chimney, but how does the flue get fixed to the sides and how do I block the chimney to stop all my precious heat from disappearing?

I hope this question makes sense!:)

Your large chimney above the top of the opening inside will be sealed by a shelf made out of angle iron frame and steel sheet. This is called a closure plate. First of all though get the chimney lined with a stainless steel flexible liner as its such a big chimney and old.

So Line flue, (Flue liner will need no brackets to hold in place) fit top plate and clamp. Then either fit old pot or new cowl.
Make closure plate and cut hole in centre for the flue to go through. Seal all edges with fire cement.
Assemble stove parts using the instructions with the stove.
Fit vitreous enamel flue pipe from stove to closure plate. If over 1.5 metres in height fit a couple of brackets to hold the flue in place. Use a proper rigid to liner adaptor. You can either fit the adaptor below the closure plate or above. Above looks neater. All these parts a stove shop would sell and install for you if you like.
Provide adequate ventilation following the manufacturers instructions.


Stove Fan:)

Animord

StoveFan, thank you very much for that. I just couldn't / can't see how the metal plate gets fixed - the chimney is bare stone so it is not like it is a regular shape that some kind of precut piece of steel sheet will easily fit into. Is this bit expensive or will it be something that fitters see all the time?

Thanks so much for your help!

Stove Fan

Animord wrote: »

StoveFan, thank you very much for that. I just couldn't / can't see how the metal plate gets fixed - the chimney is bare stone so it is not like it is a regular shape that some kind of precut piece of steel sheet will easily fit into. Is this bit expensive or will it be something that fitters see all the time?

Thanks so much for your help!

Hi, No problem:) The stove fitter will of seen it all the time:). The fitter will fit angle iron all around the 4 sides of the chimney bolted to the stone and the sheet steel will be cut to the size/shape needed. It will then rest on from above onto the L shaped angle iron and fixed with self tapping screws. Any gaps around the angle iron will be sealed to make it airtight.
Another top tip is to fit fireproof insulation above the closure plate. Keeps more heat into the room and if anything falls down the chimney makes it so much quieter:) Your fitter will advice whats suitable for insulation.

Stove Fan:D

Animord

Stove Fan wrote: »

Another top tip is to fit fireproof insulation above the closure plate. Keeps more heat into the room and if anything falls down the chimney makes it so much quieter:) Your fitter will advice whats suitable for insulation.

lol - that bit ^ was bothering me too! Why didn't I ask here months ago instead of gazing up the chimney worrying all summer :rolleyes:

Thank you so much.

Now if you wouldn't mind nipping over to my house, choosing a stove, finding a fitter for me and maybe just lighting it before you leave...:p

Stove Fan

Animord wrote: »

lol - that bit ^ was bothering me too! Why didn't I ask here months ago instead of gazing up the chimney worrying all summer :rolleyes:

Thank you so much.

Now if you wouldn't mind nipping over to my house, choosing a stove, finding a fitter for me and maybe just lighting it before you leave...:p

^^^^:D Cheers. Stove Fan:)

gripcasey

Hi Stove fan
Could I get some of your advise.

getting stove in at moment, person installing it informed me while not the best set up it would be ok to go from 5 inch flue to 9 inch clay flue using adapter.While money is tight if I had to I would go for liner I would. If i do go for liner should it be insulated with Vermiculite. Thanks

Stove Fan

gripcasey wrote: »

Hi Stove fan
Could I get some of your advise.

getting stove in at moment, person installing it informed me while not the best set up it would be ok to go from 5 inch flue to 9 inch clay flue using adapter.While money is tight if I had to I would go for liner I would. If i do go for liner should it be insulated with Vermiculite. Thanks

Ideally line it if you can but it will work ok with 5inch to 8 inch adaptor. It would draw better on lighting as it wouldn't be heating up a cold clay flue. Generally it is not worthwhile to insulate with vermiculite around the liner. Not much room left after flue liner goes in. If it was a large stone internal/external chimney then yes insulate it.:)

Stove Fan:)

gripcasey

Stove Fan. will try and get extra few bob together so. Thanks