[Greenbuilding] greywater heat recovery

[Nick Pine]

>This issue can be resolved by simply preparing a Table showing 
>Undrained-Bathtub savings like Table 2 in RMI's Home Energy Brief #5, 
>which indicates %-savings ranging from 37% to 84% for a GFX with 8 
>types of water heating systems; including Solar & HPWH's. It's opened 
>by this link "#3" @ http://www.gfxtechnology.com/.

Then again, bathwater cooling from 105 to 70 F in a 68 F room saves 
100(105-70)/(105-68) = 95%, with no investment :-)

You lose!

Nick