hydronic heating [RE-wrenches]

[sunwise]

Jay wrote:

No the solar was "preheating" the slab by heating the sand.  The forced
heating system was in the concrete as per normal.
Jay

Hey Jay and Kurt,

These high mass systems are being installed in Wisconsin and can work
reasonably well in areas that tend to have lots of cloudy conditions
early in the heating system.  One system I worked on has a 300 foot loop
in sand almost five feet below the slab.  The owner is turning that loop
(valve) on as early as late July or early August so that by the time
that huge mass begins to deliver heat to the building, the heating
season has begun and there is lots of heat down there.

The MREA has a similar system at the Renew the Earth Institute.  Bob
Ramlow installed it as an installation workshop.  A flurry of these
systems went in around here when Packerland Solar went under and
thousands of Solar King collectors became available at 100 to 150 bucks
a panel.  Otherwise they are pretty pricey systems.

Kurt Nelson
SOLutions

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