Don, check the archives, several folks have done what you suggest.  At least a couple of them use the coolant circuit that normally heats the rear (under seat) heater.  DMc

---- Don Hanson <dhanson928@GMAIL.COM> wrote:
>   Engine heat is often used in  yachts for heating shower and galley water.
> I am surprised someone who's a Westie-gadget tinker er has not done one for
> vans.  You could pull into camp and have a hot shower waiting, even on
> cloudy days or just turn on the motor for maybe 10 minutes..
>   Don Hanson
>
> On Sun, Sep 12, 2010 at 6:28 PM, Scott Daniel - Turbovans <
> scottdaniel@turbovans.com> wrote:
>
> > cool,
> > is it baffled to prevent slosh inside ?
> >
> > next you start thinking of how to get more surface area  exposed to the sun
> > etc.
> >
> > thinking of less sunny days ..
> > I haven't seen much in the way of a heater circuit heat exchange for on
> > board hot water.
> >
> > I also have a heat exchanger off a tdi engine ..
> > it's an EGR cooler really,
> > coolant runs through many tubes in it, and exhaust flows through it too
> > ....
> > cooling the exhaust before it's introduced into the engine for EGR.,
> > so can't see why that can't be used to heat shower water.
> >
> > Scott
> >
> > ----- Original Message -----
> > From: "BenT Syncro" <syncro@GMAIL.COM>
> > To: <vanagon@GERRY.VANAGON.COM>
> > Sent: Sunday, September 12, 2010 5:14 PM
> > Subject: Re: novel solar shower spotted
> >
> >
> > Here's the unbroken link:
> >>
> >>
> >>
> >> http://www.thesamba.com/vw/forum/viewtopic.php?t=431812&sid=4e2da8cfea50e637aed82cf668a0b313
> >>
> >>
> >> BenT
> >>
> >>
> >> On Sun, Sep 12, 2010 at 4:43 PM, Alistair Bell <albell@shaw.ca> wrote:
> >>
> >>> On the samba
> >>> http://www.thesamba.com/vw/forum/viewtopic.php?
> >>> t=431812&sid=4e2da8cfea50e637aed82cf668a0b313
> >>>
> >>> It has its merits.
> >>>
> >>> alistair
> >>>
> >>

--
David McNeely