wrote in message
ups.com...
Theres another good payer: a crossflow heat exchanger on the shower.
Warm water going down the drain heats the cold supply to the shower,
result is you use much less hot water. Payback can be under a year,
depends on level of use.

Totally agree but big problem here is most BCOs throw a wobbly at such an
installation as it is beyond their experience. They 'understand' drainage
and don't like thinks out of the ordinary.