caffeine_fairy: (Default)
So; I want to build a heat sink for a poly tunnel ie keeping the poly tunnel warm at night and slightly cooler during the day.

I understand that it's possible using pea gravel, a computer cooling fan and a bunch of solar panels from those little lights which come on stakes and you stick in your garden.

Any ideas?

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caffeine_fairy: (Default)
caffeine_fairy

August 2011

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