I think the jet tub is the better way to go for off grid. You are only
heating the water and running the circ pumps a few hours/ week, and as
Bill mentioned: no chemicals.
I've tried all of the choices, and while hot water alone is nice, having
the massage bubblers is definitely better. Not having chemicals and/ or
nasty recirculated bacteria is also much better than regular hot tubs.
Off grid folks don't have to do with out modern conveniences, instead
they can do it even better.
If you wanted to get savvy, you could recycle the water after to a grey
water cistern dedicated for toilet flushing and irrigation.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 3/3/2015 7:30 AM, Bill Loesch wrote:
Hi Brian,
Great alternative and _proven_ solution. Moreover, the sanitation
aspect to heat the water once per use all but eliminates the prospect
of breeding "bugs" in the stagnant warm water. It is my understanding
that spas/hot tubs that continuously reheat the same water need to
have chemicals added to keep them sanitary (at least that is the way
it works here for a public spa/hot tub).
One other item, necessary to mention for all the rest of us not living
in the relatively mild CA/coastal climate-since the tankless stores no
heated water all tankless water heaters are subject to freezing
conditions. Oh, yes, one can take on Mother Nature and add electric
heaters, anti-freezing firing, etc. but for real world practicality,
don't subject water to freezing conditions. Solution: mount the
tankless inside the heated structure and run the hot tub line through
a freeze protected faucet.
Thanks for sharing, Brian,
Bill Loesch
Solar 1 - Saint Louis Solar
314 631 1094
On 02-Mar-15 1:15 PM, Brian Teitelbaum wrote:
Hey Allan,
For many years, my wife and I have been using an old 6’ long
claw-foot tub as our hot tub on the mountain. The 6’ tub is large
enough, but very cozy for two people. We just run straight hot water
from our Aquastar propane water heater into it, which gets it very
hot. It takes a little time to let it heat up the cast iron tub,
which cools it down just enough for a great soak. It stays hot for a
pretty long period of time, but If it gets too cool, we just run more
hot water into it.
Then we just use the gray water for garden irrigation the next day.
No chemicals, filters, or electricity needed.
Brian Teitelbaum
AEE Solar
*From:*RE-wrenches [mailto:[email protected]
<mailto:[email protected]>] *On Behalf Of
*Allan Sindelar
*Sent:* Sunday, March 01, 2015 6:05 PM
*To:* RE-wrenches
*Subject:* [RE-wrenches] Chofu Hot Tub Heater
Wrenches,
I have an off grid client who wants a hot tub, and would prefer a
propane heater rather than wood. The Chofu appears to be the only
unit that doesn't require a circulation pump. He had located this on
his own, but told me that "The propane fired, self igniting,
hydrosiphoning Chofu is no longer available domestically. Seems the
Japanese do not wish to export these to the USA anymore. I will keep
looking as this was the most sane idea for the project and of course
cheapest. Chofu listed on Island Hot Tub is currently unavailable. I
talked to him a week ago and it sounded like there was no
availability for the foreseeable future."
Does anyone have a line on where one can be located before they're
all gone? Or a good alternative?
Thanks, Allan
--
*Allan Sindelar*
[email protected]_ <mailto:[email protected]>
NABCEP Certified PV Installation Professional
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
*505 780-2738 cell*
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