Has anyone experimented with greenhouses that have thermal mass walls not just on the east, west and north walls, but also with internal walls to act as an absorber/radiator surround for trees in the greenhouse? I'm hoping to build a greenhouse like this and I'd really love to learn from those who have already tried this. I'm also planning on having crushed stone paths that let cold air drop between the rocks down to the water table on my site that isn't too far down during the winter. Figured that way the water table could heat exchange with the cold air to aid in keeping it from getting too cold.
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