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Drain-Water Heat Recovery

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Posted by Drew Cutter on December 29, 2007, 12:04 am
Can someone point me to some mfg. of drain water heat recovery . I
looking to put in a tankless waterheater. But , i want to add efficiency
to the tankless gas heater.

Posted by John on December 29, 2007, 6:35 pm
On Sat, 29 Dec 2007 00:04:24 +0000 (UTC), Drew Cutter

Excellent idea if you can  have the right setup.

The most common type will recover 30 to50% of the heat from a shower
because it has no tank and the incoming water must flow in at the same
time the outgoing water flows out. That's good for showers provide you
have   about 1 meter of vertical space below the shower drain but not
for the bath tub or cloth washer.

You can install a pump if you don't have the space .

An insolated tank to store the heat of the water going out will
recover part of the heat going out of all the water exiting but if you
value your time, forget it.

Google      heat recovery shower     for plenty of information.

Posted by DJ on December 29, 2007, 9:23 pm


Posted by Daniel Who Wants to Know on December 30, 2007, 7:05 am
The one I heard about first a few years ago was http://gfxtechnology.com/ .
Other sites are easy to find with a simple Google search for grey water heat

Posted by Drew Cutter on December 31, 2007, 1:54 am
 Daniel Who Wants to Know wrote:

I knew about gfx . But i didn't know about renewability. Looks like both
are the same product.

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