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<font face="Times New Roman, Times, serif">Kirk,<br>
<br>
After some experience with exactly the complaints you have been
getting (the sound of the boiler running drives people nuts), I
wouldn't install SHW on an indirect/boiler system without a
bypass. It's just an extra pipe and two ball valves. A pipe with a
valve going from the output of the solar tank to a foot or so
after the hot output of the indirect tank. The other valve goes in
between that tee and the indirect tank. Have them turn off the
boiler in the summer, close one valve and open the other. The
customers who care will do it. Without the bypass you'll get
people who turn off their boiler in the summer and complain
because they have to run the entire contents of the indirect tank
out the faucet to get hot water.<br>
<br>
You can add a little backup to this by sticking a 1400W electric
element in the solar tank and setting the thermostat to 120F. That
way, even in a rainy summer you'll never get a call.<br>
<br>
Hilton<br>
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<pre class="moz-signature" cols="72">--
Hilton Dier III
Renewable Energy Design
Partner, Solar Gain LLC
453 East Hill Rd.
Middlesex, VT 05602
Tel: 802-223-6652</pre>
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