Multi fuel stove/flue issues

[Pcot]

Help/advise required please. I'll try and provide as much info as i can....
I've bought a small multi fuel stove, to heat my conservatory.
Its a Coseyfire Vision 7-8kw multi fuel wood burning stove.
I bought 3 x 1 metre lengths of single skin vitreous flue pipe, and a top cap.

I fitted the stove a week ago. Its standing against a brick wall that is 1.7mtrs high, with the 3mtr flue exiting through the glass roof.

Lighting the stove for the first time, was somewhat of a challenge, but eventually it lit!
It was running for 4/5 hours, burning dry wood. The smell was quite strong, but i expected this, because it was new.

Its been running, on and off for the past week. Its blowing smoke out of the air vents, and also from a gap between the stove body, and the stove top.

The conservatory absolutely stinks, as does most of the house! The final straw was last night, when the carbon monoxide alarms started going. The stove has now been shut down, and can stay that way until its sorted out.

I've searched the web, and believe there's a downdraught issue. A friend had a spinning cowl that i borrowed, and it made no difference.

Questions:
Is the stove i bought, a crock of crap, £220 eBay!
Do i need to extend the flue, which will require two bends, and another 6mtrs of flue, to get above the house ridge?
Should i have used twin wall insulated flue?

Any advise would be more than welcomed.

Edited by Pcot on Sunday 6th February 12:44

[TooLateForAName]

sounds like it.
Probably.
Yes.

Have you read the Building Regs document for stove/flue installs? How does the flue outlet sit with respect to walls/roof etc? http://www.planningportal.gov.uk/uploads/br/BR_PDF...

The recommendation is for flues to be a minimum of 6" for woodburners and I assume that you've only used 4 or 5 inch?

[Pcot]

The stove has a 5" outlet, so must be designed to be used with a 5" flue, no?

The flue is 1.6mtrs away from house, and 0.6mtrs above conservatory ridge.

[Ferg]

It sounds like the chimney doesn't have adequate draw. You need a negative pressure, the stove won't be designed or built to be smoke tight.

[Pcot]

Ferg said:

It sounds like the chimney doesn't have adequate draw. You need a negative pressure, the stove won't be designed or built to be smoke tight.

Thanks Ferg.
Would raising the flue's termination point, find the negative pressure needed?

[Ferg]

Essentially you need wind across the top to create the draw, so yes probably, but a cold flue will stall as well so I'd go insulated I think. You could do with a draft gauge or some smoke pellets to check whatever you do.

[Pcot]

Sounds like i need to be terminating the flue above the house roof then.
Thanks.

[andy43]

Ferg's right - it won't work without being a twinwall flue - single skin just won't get hot enough.
Another +1 here for above the ridge.

[nismobrown]

we have a stove shop and do not have 1 stove in stock that costs us any where near this little.

many customers have removed these cheap Chinese or similar stoves and replaced them with a Dunsley, esse , Franco Belge, Brosely etc.

reason being many do not perform as good as they should and customers worry about the possible nightmare if things go wrong.

just like buying cars or performance parts for cars- you get what you pay for.

if a spinning cowl does not cure the downdraught it is very unlikely any other anti downdraught cowl will unless it is a powered extractor.

I think your flue is far too short and you do not have any insulated which makes things even worse.

if possible you should have no more than 1.5 mtrs of single skin before connecting to a ht plus insulated pipe or similar.

If possible try and get 4.2 mtrs of flue measuring from the top of your stove to the top of the flue ( do not include cowl height in this measurement)

for more information visit our stovedepot.co.uk site and read the relevant information.

if you need any more help feel free to contact us .

good luck ! Dave.


Questions:
Is the stove i bought, a crock of crap, £220 eBay!
Do i need to extend the flue, which will require two bends, and another 6mtrs of flue, to get above the house ridge?
Should i have used twin wall insulated flue?

Any advise would be more than welcomed.

Edited by Pcot on Sunday 6th February 12:44

[/quote]

Edited by nismobrown on Sunday 6th February 18:25

[Qcarchoo]

Have you allowed for some ventilation in the room?
A 7-8KW stove will require a separate vent (building regs) especially if the house is double glazed and draught proofed.

[Pcot]

Nismobrown/Dave, some sound advise - Thank you.

[Pcot]

Qcarchoo said:

Have you allowed for some ventilation in the room?
A 7-8KW stove will require a separate vent (building regs) especially if the house is double glazed and draught proofed.

I took into account the need for ventilation, and left a couple of windows open slightly, to aid airflow.

The conservatory is exempt from building regulations.

[ss64ii]

Did the OP ever get this sorted?
Looking at a 4KW Coseyfire today for the lounge, any other comments on them?
Cheers