stove flue size

sohappy

Fitting a 16kw stove with a 6in flue comming straight off the top of the stove (5ft in length) This will be connected straight into an existing 10in clay flue using a reducer fitting, The clay flue runs another 21 feet to the chimney top,
My question is will this be sufficent for enough of a draw for a stove to operate properly at low heat ie, will the 10in flue be too large? I guess there would be no problem with a blazing fire in the stove but what happens when I close the damper?
the supplier says im better to run a flexy flue the whole way up and backfill around with vermiculite, at the cost of an extra 400e, he says the exhaust gas will stay hotter in the flue and rise better, anybody have any thoughts on this before I splash the cash, I think 8in is normal for a clay flue but my flue is 10in internal

richieburke01

sohappy wrote: »

Fitting a 16kw stove with a 6in flue comming straight off the top of the stove (5ft in length) This will be connected straight into an existing 10in clay flue using a reducer fitting, The clay flue runs another 21 feet to the chimney top,
My question is will this be sufficent for enough of a draw for a stove to operate properly at low heat ie, will the 10in flue be too large? I guess there would be no problem with a blazing fire in the stove but what happens when I close the damper?
the supplier says im better to run a flexy flue the whole way up and backfill around with vermiculite, at the cost of an extra 400e, he says the exhaust gas will stay hotter in the flue and rise better, anybody have any thoughts on this before I splash the cash, I think 8in is normal for a clay flue but my flue is 10in internal

You have to put a flue liner and vermiculite in or the chimney will drop below dew point temperature and create condensation
Which will damage the stove ( rust it )

sohappy

richieburke01 wrote: »

You have to put a flue liner and vermiculite in or the chimney will drop below dew point temperature and create condensation
Which will damage the stove ( rust it )

Thanks for the reply, stainless steel flue and vermiculite it is so,

richieburke01

sohappy wrote: »

Thanks for the reply, stainless steel flue and vermiculite it is so,

Yes twin wall stainless steel liner and vermiculite will do the trick
Go on Mi flues website for more info