NANFA-- Re: nanfa V1 #1217
Sat, 23 Mar 2002 23:20:15 EST

In a message dated 3/23/2002 8:26:35 PM Eastern Standard Time, writes:

> Jeff-

You need mass for solar heat storage, not just a heat absorbtitve (black)
color, and you need exposure to heat such as direct sun (the more the better)
to heat the mass. I don't know of where you can get square black containers,
but you could spray paint black any stackable container and fill it with
water. Dark stone (slate, dark marble/granite for example, the thicker the
better), is also good for solar heat storage. You can often find both at yard
sales or get blemished pieces cheap from stonemasons.
Bruce Hahn
I am close to enclosing my greenhouse and would like to obtain some

> square plastic containers perferably black that can be stacked against
> the back wall to function as thermal mass for solar heat storage.
> Anyone know of a source where I might get them - possibly as throw
> aways. I would need a source in or reasonably near western Pennsylvania.

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