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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> sanjay jain
[mailto:sanjayjainuk@yahoo.co.uk]<BR><B>Sent:</B> Monday, 5 September 2011
11:19 AM<BR><B>To:</B> Nick Pyner<BR><B>Subject:</B> Re: [Greenbuilding]
Technology for long hot showers<BR><BR></FONT></DIV>
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<DIV><SPAN>Nick,</SPAN></DIV>
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<DIV><SPAN>Please elaborate on why you think recirculating hot water is not
"environmentally kosher".</SPAN></DIV><FONT face=Arial color=#0000ff
size=2></FONT></DIV>
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class=218324501-05092011><FONT face=Arial color=#0000ff size=2>I said "could
be". It depends on your energy supply system and your personal
habits.</FONT></SPAN></DIV>
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class=218324501-05092011><FONT face=Arial color=#0000ff size=2>You could be on
an off-peak water heating system. The re-heat means you have to use a lot of
power quickly, and on the spot. If you are taking the shower in the off-peak
period, I guess it isn't such a great problem. But if you are taking a shower
at any other time, the power bill could go through the roof. At a guess, you
would need to use about 4kW for re-heating but it would be hard to find
a heater actually that small.</FONT></SPAN></DIV>
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<DIV><SPAN>I would have thought it would be the most energy and water
efficient (except the fog system - thanks for that Reuben) way to take a long
shower. You are essentially reusing the water over and over again, and the
energy required to maintain desired temperature would be less than trying to
use a heat recovery method. No?<SPAN class=218324501-05092011><FONT face=Arial
color=#0000ff size=2> </FONT></SPAN></SPAN></DIV>
<DIV><SPAN><SPAN class=218324501-05092011></SPAN></SPAN> </DIV>
<DIV><SPAN><SPAN class=218324501-05092011><FONT face=Arial color=#0000ff
size=2>Yes, well, in fact, "No" is quite likely to be the correct answer.
Even in a benign climate, a heat exchanger will easily recover
4kW.</FONT></SPAN></SPAN></DIV>
<DIV><SPAN><SPAN class=218324501-05092011></SPAN></SPAN> </DIV>
<DIV><SPAN><SPAN class=218324501-05092011><FONT face=Arial color=#0000ff
size=2>And that is without having to worry about pumps, valves, tanks, and god
knows what all else. Further, the legal issues that may be incurred by
mixing fresh water and grey water are probably best left
undiscussed. </FONT> </SPAN></SPAN></DIV>
<DIV><SPAN><SPAN class=218324501-05092011></SPAN></SPAN> </DIV>
<DIV><SPAN><SPAN class=218324501-05092011><FONT face=Arial color=#0000ff
size=2>Nobody seems to know how the Quench shower handles all this. I guess
nobody dares to ask.</FONT></SPAN></SPAN></DIV>
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<DIV><FONT size=2>Nick Pyner<BR><BR>Dee Why NSW
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