[permaculture] permaculture Digest, Vol 82, Issue 37

georg parlow g.parlow at gmx.at
Fri Nov 20 15:46:03 EST 2009

> brick floor and black water drums to store thermal mass; I'm  
> wondering if anyone has found a better material to store the water  
> in, for example rectangular so there's not as much heat loss between  
> the barrels?

to my understanding you want the thermal mass to 'loose heat' - this  
is what keeps the temperature up in your greenhouse. if heat is just  
stored but not relesed into the surroundings (inside the greenhouse),  
they are no good anyways.


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