Check this out...
http://dornob.com/quite-possibly-the-coolest-hot-tub-you-have-ever-seen/
Dan
--- In papercreters@yahoogroups.com, "bhangchai" <Dan.Nave@...> wrote:
>
> Recently, one of my friends mentioned that their mother had set up a bathtub system by which the water could be heated with an external heat source. It was merely an arrangement where a pipe was connected to the bottom of the tub and run out a ways from the tub. At that point the pipe was formed into an ascending coil and then went back to the top of the tub. Some sort of stove with a fire was lit below the coil in the pipe. The cold water came from the bottom of the tub to the coil and the heated water left the top of the coil by convection, making its way back to the top of the tub. Not very fancy, but they said it worked quite well. (This was in India, in the Himalaya mountains; a sister city to Simla which is being featured currently on the TV show "IRT Most Dangerous Roads.")
>
> This sort of system could be set up as a batch system to heat from a TLUD type stove using appropriate waste wood and sticks, etc.
>
> http://www.bioenergylists.org/stovesdoc/midge/THE_COMPLETE_MIDGE.pdf
>
> There are a lot of examples of this stove on Youtube if you are interested.
>
> Dan
>
> --- In papercreters@yahoogroups.com, JUDITH WILLIAMS <williams_judith@> wrote:
> >
> >
> > Has anyone used an on demand water heater to heat a hot tub? Would this be wildly impractical? I would love to have an outdoor water feature where I could soak but am not up to figuring out solar or anything like that.
> >
> > The Making of Papercrete DVD now available on Amazon.com
> > http://www.amazon.com/Making-Papercrete-Judith-Williams/dp/B0040ZNE9A/ref=sr_1_1?ie=UTF8&s=dvd&qid=1283998627&sr=8-1
> >
> > Follow progress on the new project at http://www.papercretebyjudith.com/blog
> >
> > More papercrete info at http://squidoo.com/papercretebyjudith
> >
>
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