Snag wrote:
Bob F wrote:
Snag wrote:
Dump the drains of stuff like shower/tub , dishwasher , etc into a
BIG tank . Let the drain draw from the bottom , where it's coolest
. Use the waste heat supplemented by solar? to heat a thermal
storage mass - like a massive stone feature wall . I HATE to throw
heat away in winter ! Especially when it costs me $ .10 a Kw/hr .

Get one of these.
http://www.ecobuildingpulse.com/heat...the-drain.aspx


I knew this had to be too good of an idea to be original to me ...
that said , I believe I can build one cheaper than I can buy it - if
it is even available here . And I'll have plenty of space under the
house on the downhill side , where the kitchen will be . I'll bet
this in conjunction with an instant hot water heater would be a great
combo !

There are plans and videos availble about building your own. One of the
characteristic of the commercial units is the "laminar flow" concept which is a
design which ideally runs the waste shower water down the walls of the pipe in a
thin layer on the copper, rather than dripping it down the middle or just
flowing on one side, either of which would decrease the heat transfer from the
waste to the incoming water.