The Natural Philosopher wrote:

John Carlyle-Clarke wrote:
That is really why I was thinking about the reflective qualities of the
backing, but I guess with a stove obscuring most of the opening,
re-radiated or reflected heat from the backing is not going to make much
difference.

Nope. Render it. All you really need is an air gap around it to allow
convection off it to come out to the room, A couple of inches is fine.

The actual stove temps are not that great. Couple of hundred C at the
most outside. OK too much for wood, and maybe plaster, but fine on
masonry and render.

Or as John says, use some fireproof board painted black. Thats quick and
simple. and will let less heat into the structure than render. But I
think render - with sharp sand and white cement - looks nicer.


4KW is a powerful fire. The UFH in my house is rated at 100w/sq meter.
Thats 3KW in a 6x5 sq meter room. I get a rate of rise of about 1 deg C
per hour with that..the open fires do about three times that once the
brickwork is warm.

I think you are going to love that stove.

Thanks for all your comments. I thought the same thing about the brickwork,
but the HETAS registered installer that I spoke to first was so firm about
it being a problem that I assumed he must be right and I must be wrong. It
is an internal wall.

Rendering I suppose is a good solution, and cheaper than the £90 for painted
steel.

I'm hoping we're going to love the stove too This room is also about 6m
x 5m.

Here is the little beauty.

http://www.aarrowfires.com/which_multi_acorn.php