On 26 Jun 2011 21:54:51 GMT, Steve Firth wrote:

What output to water will the woodburner give you?

I'm considering a 12kW woodburner with 6kW estimated to the hot water.

So 6kW to the room... This is a large room or one very poorly
insulated then?

You don't want a Coalbrooke Dale Muchwenlock stove with boiler do
you? Sneaky feeling that you aren't in the UK though. Not quite that
output but too big for the room that the stove will be in. It would
have been OK for the current living room (4.5m x 9m x 2.4m ish).

I don't think so. I have a standard DHW setup with a log burner of
similar size. I've never had it boil even when blasting it with heat in
winter.

Fairy Nuff.

Doesn't the DPS use a passive thermal valve and a mains water dump
to
cool the store in extremis,

Not mine, but it is an option.

normally it just runs the CH pump to loose heat.

That's the only option that I have.

The cautious side of me says "what happens if there is no power"...
Thats just when I'll be wanting to have the woodburner on not off
'cause the store is overheated.

I went for the DPS because of the tech support which is outstanding, the
high output of the plate heat exchanger, and the fact that the exchanger
can be changed if necessary.

Our water is soft so scale is not a problem. It's also "what happens
if the power is off" again. KISS and passive rules... I'm almost
presuaded about mains pressure HW or at least HW from the mains via a
pressure reducing valve but not having stored water makes me nervous.

--
Cheers
Dave.