On Wed, 05 Oct 2005 09:20:09 -0400 in Rob wrote:

I think keeping large amounts of water in the greenhouse is an
excellent idea. In containers painted black if you can, but for
simplicity I've just been filling gallon milk jugs and putting them
under the benches. With a toddler, I have lots of milk jugs. Or
(around here at least) I've seen them in the recycling center in
thousand quantites, waiting to be melted, they don't mind if you recycle
a few hundred yourself. In small units of a gallon, the water is easy
to carry, and you can move the milk jugs (or throw them away) if you end
up needing the space that they are in. If algae or other stuff grows in
the jugs, more the merrier. They will absorb heat better...

I've heard, granted mostly from the person that came up with the following
idea, that water and other normal thermal masses aren't very effective
in a green house environment.

With that said, has anyone here tried sunny john's subterranean heating
and cooling system for a greenhouse with orchids?
http://www.sunnyjohn.com/indexpages/...reenhouses.htm

I may be setting one up for someone that needs to propagate grapes,
and will collect environmental data to see if it's compatible with
anything I grow.

But if someone else has done it, it'll save me a lot of trouble :-).


--
Chris Dukes
Suspicion breeds confidence -- Brazil