Comments on: Power-Pipe Heat Exchanger Reduces Water Heating Costs by 40%

By: Apricor

Apricor — Wed, 05 Sep 2012 15:52:00 +0000

Excellent idea, but there is a problem. The water pre-heated by the heat from the drain water only benefits the user once the hot water tap is opened, so that it can enter the hot water tank. If nobody does that for quite a while, it will cool down again.

By: Bob_Wallace

Bob_Wallace — Tue, 04 Sep 2012 15:55:00 +0000

As much as 40% under what conditions?

Not when someone takes a leisurely bath. When they pull the plug that water is likely not very hot.

Not from the typical shower. I would imagine a lot of people mix in some cold to make the water ‘not really hot’, then the water is sprayed into the much cooler air before it reaches the drain.

This one, I’d want to see an independent lab give it a good analysis before getting excited.

Tankless water heaters give 27% to 50% energy savings.

By: yu tube

yu tube — Tue, 04 Sep 2012 15:28:00 +0000

Nice, passive, no maintenance, SHOULD be low cost(don’t overcharge), don’t see any downside. On slab houses don’t have much vertical runs so may have to settle for horizontal install.
Wait..just visited homepage, company charges $500 for cheapest model, yep if its green we must overcharge the suckers for it.
This is why green doesn’t advance much. Send an example to China and they’ll copy it and ship it to USA for less than $99.