Hybrid Car – More Fun with Less Gas

Drainwater Heat Recovery - Page 3

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Posted by LM on February 14, 2007, 7:04 pm
Brian Graham wrote:

I'd post a quick note.

talks about Drainwater Heat Recovery and references a web site. Check out the
link below for more info.

Looks like a copy-cat of the GFX.

I think it is a great feature though, especially for a large family.


Posted by daestrom on February 22, 2007, 12:46 am

If you want to use it for grey/black water, check out the gfxtechnology.com
products.  By placing vertically, and using the gravity-film effect, they
get quite good performance in a compact space.

Mine is the largest unit, and measured performance has ranged around 50%.
By plumbing the cold supply to both the shower and the hot-water heater
through it, it maximizes potable water flow rate and performance.

Yes, I can turn down the 'hot tap' quite a bit.  And the tank supply of hot
water lasts through four or five showers.

Other ideas have been discussed, just google for them.  Nick has a favorite
about using a 'batch' mode of recovery.  The GFX design doesn't do that, it
only recovers heat while the drain water and supply water are actively


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