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      Hi Brian,<br>
      <br>
      Great alternative and <u>proven</u> 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).<br>
      <br>
      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. <br>
      <br>
      Thanks for sharing, Brian,<br>
      <pre class="moz-signature" cols="72">Bill Loesch
Solar 1 - Saint Louis Solar
314 631 1094</pre>
      On 02-Mar-15 1:15 PM, Brian Teitelbaum wrote:<br>
    </div>
    <blockquote
      cite="mid:3c14330a1cb1960a43ce6352c22e17b1@mail.gmail.com"
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        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Hey
            Allan,</span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">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.</span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Then
            we just use the gray water for garden irrigation the next
            day. No chemicals, filters, or electricity needed.</span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Brian
            Teitelbaum</span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">AEE
            Solar</span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
        <div>
          <div style="border:none;border-top:solid #b5c4df
            1.0pt;padding:3.0pt 0in 0in 0in">
            <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
                RE-wrenches [mailto:<a moz-do-not-send="true"
                  href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>]
                <b>On Behalf Of </b>Allan Sindelar<br>
                <b>Sent:</b> Sunday, March 01, 2015 6:05 PM<br>
                <b>To:</b> RE-wrenches<br>
                <b>Subject:</b> [RE-wrenches] Chofu Hot Tub Heater</span></p>
          </div>
        </div>
        <p class="MsoNormal"> </p>
        <p class="MsoNormal">Wrenches,<br>
          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."<br>
          <br>
          Does anyone have a line on where one can be located before
          they're all gone? Or a good alternative?<br>
          <br>
          Thanks, Allan</p>
        <div>
          <p class="MsoNormal">-- <br>
            <br>
          </p>
          <p class="MsoNormal"><b>Allan Sindelar</b><br>
            <span style="font-size:10.0pt"><a moz-do-not-send="true"
                href="mailto:allan@sindelarsolar.com"><u>allan@sindelarsolar.com</u></a></span><br>
            <span style="font-size:10.0pt">NABCEP Certified PV
              Installation Professional<br>
              NABCEP Certified Technical Sales Professional<br>
              New Mexico EE98J Journeyman Electrician<br>
              Founder (Retired), Positive Energy, Inc.<br>
              <b>505 780-2738 cell</b><br>
              <br>
            </span></p>
          <p class="MsoNormal"> </p>
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