On Sun, 11 Mar 2007 09:38:21 -0000, "R.P.McMurphy"
wrote:


No they don't!. The one we have is fine except when it gets down to say
less than 2-3 deg c when it spends a lot of time defrosting itself which
means that its taking quite a bit off the mains in order to so that, but
anything above those temps, its fine.

If you could imagine its working in reverse to what its doing in the
summer months.. its trying to "cool" the outside air and get rid of the
heat inside the room!...

But where heat pumps really do work for heating is where there's a
modestly accessible geothermal source. This could be a bit of pipe laid
at a modest depth under the garden or a heat extractor in a local stream.

Not particularly easy DIY projects though.

--
Clive Mitchell
http://www.bigclive.com

As it happens i have a stream flowing past my garden...is it easier/better
to use that as a heat source than burying pipes? I have considered seeing
if it'd be possible to have my own hydro electrical generator running of it
too..but am unsure where to start!

Steve



I have some friends in Sweden who have this scenario and looked into
it for heating of a swimming pool.

As it turned out, unless the water flow was substantial and with
considerable drop (it wasn't either), the hydroelectric idea wasn't
viable.


OTOH, there did seem to be a range of geothermal equipment available
that would work with a borehole and they went with that. It could be
that this kind of equipment could work with water circulated from a
stream as well


--

..andy