Interesting, <br><br> From <a href="http://www.geo4va.vt.edu/A1/A1.htm">this map</a> (about 1/3 down), soil temperatures 30' down are ~62 degF. If we can get a ground loop of sufficient size and depth, we can make use of that temperature for the entire shop. The only issue is that we are on rented property and are limited in how deep and far we can dig. The alternative is to rely on water from the tap. However, that may not be feasible since I have observed the tap water to come out pretty cold in the winter. So I assume the water lines are 10 feet down or shallower.<br>
<br> - Ethan<br><br><div class="gmail_quote">On Tue, Jan 4, 2011 at 5:33 PM, Nathan <span dir="ltr"><<a href="mailto:indigo_ecs@yahoo.com" target="_blank">indigo_ecs@yahoo.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">How about a ground loop? Not as warm as solar, but it will cool during the summer and warm during the winter...<br>
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