- #1
JoeCal
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In building a subterranean heat sink for a greenhouse , what would be the best material to use in the heat sink through which the hot air of the greenhouse would be travel to warm. that is what materials would absorb the most heat easily and at the same time slowly release that captured heat?
Preferably, what would the a.) best material be b.) the best rock to use, c.) would it be better to be more solid (bricks, concrete) or a dense gravel mixture or a combination of both.
Preferably, what would the a.) best material be b.) the best rock to use, c.) would it be better to be more solid (bricks, concrete) or a dense gravel mixture or a combination of both.