Andy Hall wrote in message . ..
On Wed, 21 Jul 2004 12:02:40 +0100, "IMM" wrote:

There are off the shelf greywater re-cycling systems around. In the BENELUX
countries it is standard in new builds to have a large tank under the ground
to collect rainwater from the roof.

There are a few packaged waste water units, I recall they are mostly
German. There is an American shower waste that is copper with a spiral of
pipe around the outside. The waster shower water spirals around the outside
of the waste pipe and passes heat to the incoming cold shower water in
effect it extends your cylinder size with making it larger.
http://www.endlessshower.com/ This unit really works.

Do you have one or is it just that the web site says so?

Actually some folks have gone thru the calculations and hes right this
time, its an excellant idea. Its a simple cross flow heat exchanger:
warm waste preheats the cold supply so less hot is needed. Cuts hot
use quite a bit.

ISTR paybacks of about 6 months. I posted on a thread about it
somewhere, not sure which ng though.


Also concentrating on using less water, when on a meter, is very wise. We
spend as much on water as on gas, yet we all go ape about gas boiler/system
efficiencies and forget the water bills. Most water appliances, electrical,
toilets, basins (do you really need a large wash basin?) , etc can be low
usage. Power showers do not have to be 15 litres/min, 10 and less will do
as the power force of the water against the skin is what people want not so
much the volume.

You may do. Not everybody else does. Multiple head showers would
not sell if your hypothesis were true.

maybe, maybe not... prestige and image is big for most buyers.

Regards, NT