Originally Posted by redskip
First post. I've had a read through this thread and found it very useful. I'm looking for some feedback advice on selection and installation of a stove for a new build that is yet to start. We have a kitchen / dining room (15ft by 26ft approx) adjacent to a sitting room (20ft by 15ft approx). We are looking to install a double sided stove between the two rooms. See attached image for layout and dimensions. The sitting room has a vaulted ceiling circa 15ft.
The house will be well insulated, at a level equivalent to what an A2 rated house would require albeit I expect our airtightness levels to be in the 3 to 4 range rather than 2 as required for an A2/A3 house.
Our requirements: double sided inset stove, multifuel, external air supply (as installing a heat recovery unit).
1. When is a twin wall flue run required and when can you use the standard clay pipe / lining plus reducer down to the stove. Am I correct in saying that the twin wall run is only required when passing through walls or floors?
2. How to select the correct rating when considering the two rooms - is it as straightforward as the LxHxWx5 rule of thumb for one room? Especially important given the vaulted ceiling in the sitting room.
3. Should I be looking out for anything in particular regarding the make up of the stove, i.e. material?
4. Any recommendations? There are not too many options, given our requirements. A trawl of the web and cold calls to suppliers has thrown up the following: the Boru 600i and 900i, Zuzia 16kW, Amelia 25kW, and Oliwia 18kW stoves, Barbas Unilux Cuatro Tunnel (although that one is only available in 7kW max). None are reviewed on the whatstove.co.uk website.
Any advice would be appreciated, I've received one quote so far for supply and fit (but for a 10kW stove that is woodburning only) and have had a few discussions with salespersons but am just looking for some independent advice. I've a very limited knowledge on stoves!
A twinwall insulated flue is used where there is no chimney in the house already, ie masonry chimney.
If no chimney the twinwall should start from 1metre to 1.5metres above the stove and run the entire height of the chimney to outside.
If your house has a block/masonry chimney built with an 8inch wide clay lined flue, you could use an adapter to join the insert stove flue outlet to the clay lined adapter.
My advice would be to line the chimney with a stainless steel flexible liner of 904 grade for multifuel use. Make sure the liner is the recommended size for the proposed inset stove.
There are many online stove output calculators. Just do a google search
On one I used it recommended a stove with an output of 11kw in total for the two rooms. For your vaulted room I based the ceiling height as an average of 10 feet overall.
I think you will find most inset stoves are made in steel with cast door and fitting, this is fine.
I havent installed any double sided insert stoves or know of any I would recommend.
Look for stoves built to BSEN13240 Or Amd2 2002 or conforms to CE markings. Look at stove spares prices too. Ie door glass, grate, firebrick linings etc.
Look for stoves that feature, riddling grate, Tertiary air, Secondary burn etc. You are very wise to get one with an external air supply option.
Try to buy a named, well known brand.