On 6 Mar 2006 07:55:36 -0800, "buffalobill"
wrote:

google has lots of stuff on this at:
http://www.google.com/search?num=100...ot+tub&spell=1


The Solar Option has been mentioned. If you can rig a way to use gas
to preheat the water, you will probably find that less expensive than
electricity.

One hundred years ago in Japan they used wood heaters to heat their
bathwater. It was a good idea then and it can be an economical choice
today. Several wood stove manufactuers ofter a hot-water heating
option.

Indoors is better than outdoors for a hot tub location. With an
indoor tub, all the waste heat will at least contribute something to
heating your house in the winter. The heat loss from the outdoor
tubs goes straight into the air.

beachcomber