Ed Sirett typed:

On Sun, 23 Jan 2005 16:31:13 +0000, Mark wrote:

IMM typed:


Bear in mind the shower waste goes through it, so the shape
needs
snip
You can make your own using two large bore copper pipes. One inside
the other. The mains water is in the gap between the two.

FFS how many showers do you people have a day.
Has anyone given the slightest thought to how efficient this will
be, and the likely rise in temperature achievable.
Even I cant be bothered to build one of these.

There are only two ways this will save energy.
1) You can set the shower to half heat (assuming it has such a
setting). 2) The greater flow of water permits you to have a shorter
shower.



And somewhere to fit the thing, did you note the size!
http://gfxtechnology.com/bobvilahbb.html
"GFX can cut one of the largest peak water heater loads, the shower, by
50%."
Rollocks, did Dimm invent this
You would save more energy per year by shooting the cat and boarding up the
cat flap.
Or trying to recover more of the lost heat going up the chimney/flue.

--
Mark