Condensate on vertical flue?

[markocosic]

Do we need to worry about condensate?

 

 

SWMBO would like a wood burning stove with a completely vertical flue that exits out the top of the appliance and runs straight up through the roof.

 

This is instead of exiting the back of the appliance and running through an outside wall into a "T" with the flue on top and a drain on the bottom.

 

 

Will we need to do anything special for condensate or can plain flue (we propose black painted double wall all the way from the appliance up) sit directly on top of the appliance?

 

 

The house is a timber frame. It is a warm pitched roof with no attic/sloping ceiling. The flue would run for ~2.5 metres internally, ~0.5 metres through roof structure, then ~2 metres externally.

 

This is the stove we're considering: (2.5-7 kW, 130 mm flue, external air feed, a semblance of convection hating / shielding to avoid surfaces being too hot)

 

https://www.senukai.lt/p/kietojo-kuro-krosnele-abx-viking-i-black-7-kw/ejvd?cat=b88&index=16

http://www.abx.cz/cs/viking-i--cerny-korpus-oplasteni-cerny-plech-p805v17

[joe90]

My wood stove flue is vertical from the stove (but into masonry chimney with insulated liner) and we have no condensate issues!

[ToughButterCup]

6 hours ago, markocosic said:

Do we need to worry about condensate?

...

 

Yes, and no.

No, because - at the ideal burning temperature - you have put dry  (<15%) wood on the fire , and yes if the wood is ..... 

How you deal with the condensate is another matter.

[ProDave]

A standard twin wall insulated flue, has the inner joint overlapped such that if there is any condensate, it will run down into the stove (and evaporate again) rather than run out at the joints and down the outside of the flue.

[markocosic]

Thanks, makes sense.

 

Wood will be dry. An excess of the stuff here vs foreseeable usage so plenty of time to dry.

 

It was more when the stove wasn't in use that I had in mind. It sounds like that isn't a thing. ?

[PeterW]

Make sure you get a decent cowl fitted that both keeps the birds out and also the water out.