[rescue] SGI Challenge Resurection (was : More Indigo Problems)

Phil Stracchino alaric at caerllewys.net
Mon Jul 26 21:34:43 CDT 2004

On Mon, Jul 26, 2004 at 07:28:08PM -0700, Sheldon T. Hall wrote:
> Dan Duncan says ...
> > Has anyone played with ground source heat pumps for heating/cooling?
> I've look into it.  Expensive.  You need many, many feet of pipe, deep in
> the ground.  IIRC, just to A/C my 1,500 SqFt house in Atlanta, it was 200 Ft
> of 2" pipe, 5' down.  The heat exchanger was much more than the typical
> residential heat pump, too.  I think the whole deal was going to be 3 or 4
> times the $3,000 it cost to replace the gas furnace with a "regular" heat
> pump.

I'll bet a water-cooled heat exchanger would work well, in a building
next to a lake or river.

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