[RE-wrenches] Chofu Hot Tub Heater

[Dana]

We had an off grid client who did not want a wood fired heater or wood tub & did a battery based circ pump (Dankoff) @ 24 vdc for the spa and propane heaters about 30 ft away out of sight & it worked really well. Bought a hot tub shell at a wholesaler in Denver, super insulated the 2” supply & return lines, & created the controls at 24 VDC. 

No blower or bubbles!

 

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Dana Orzel 

Great Solar Works, Inc -  NABCEP # 051112-136

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From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Dan Fink
Sent: Monday, March 02, 2015 9:03 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] Chofu Hot Tub Heater

 

Snorkel or their Scuba. The Scuba is made for shallow 2 ft stock tanks.My 2 installations have been fine for a couple decades. No plumbing required. The Chofu had a thermosiphon thing going on. For the Snorkels.I do use a circulation pump  a few minutes at a time-- just a submerisble bilge pump at the bottom, otherwise you'll be out there with a  canoe paddle eliminating stratification, which (ahem) tends to make some body parts uncomfortably toasty for a short period of time as one eases into the tub.

At some point I wish to put my Scuba in a small greenhouse to make it work year-round, and pre-heat with a simple solar DHW system.




Dan Fink

Buckville Energy

IREC Certified Instructor™ for: 

~ PV Installation Professional

~ Small Wind Installer

NABCEP / IREC / ISPQ Accredited Continuing Education Providers™
970.672.4342

 

 

On Sun, Mar 1, 2015 at 7:04 PM, Allan Sindelar <allan at sindelarsolar.com> wrote:

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
allan at sindelarsolar.com
NABCEP Certified PV Installation Professional
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
505 780-2738 <tel:505%20780-2738>  cell

 


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