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.
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