"Robert Gammon" wrote in message
. net...
wrote:
Robert Gammon misunderstands again:
snip
Goto www.gfxtechnology.com/GFX-STAR.html and click on Application Notes
and click on the link to Retrofit of an existing Solar Hot Water Heater.

You sir, need to READ first, before you make accusations that you cannot
back up with facts.

In there he describes a patent pending application of GFX Star in an
industrial process control application.

The models of what happens to the efficiency of his product with changing
potable water flows thru the equipment are there for all to see.


Okay, *I* read the documents. It is clear that you must have a separate
storage tank for the GFX-star setup to work 'as advertised'. Only by using
a *cooler* separate storage tank is the setup able to capture the waste heat
from 'batch' drains. Once the storage tank reaches the temperature of the
greywater (or exceeds it in the conventional heater storage tank),
performance will drop off.

This way can effectively 'shift' the heat from outgoing batch drains to a
separate storage tank of fresh-water. So the greywater doesn't have to be
stored, and you can still use the low-maintenance, straight-bore, GFX
heat-exchanger.

For 'best' performance, you would want to route the storage tank outlet to
the 'cold' tap for the shower as well. This looks like their 'tempering
valve' arrangement. But you might be better off routing straight 'cold'
water from the supply directly to sinks and laundry, bypassing the whole
setup for cold supply to those usage points. Otherwise you would be wasting
some of the captured heat on laundry, and who wants a glass of warm water to
drink. Some more plumbing :-(

Someone mentioned some concerns about storage tank of 'warm' water and
Legionarries disease. But if you have treated water, that probably isn't
too much of a concern.

daestrom