Name: Anne Summerville, SC (Zone 8a) Only dead fish go with the flow!
Hi and welcome! I live in South Carolina, USA. My greenhouse is about two thirds the size of yours and in summer I open the vents and use a box fan on a bench at one end to keep the air inside moving and use a window screen on the front door to keep the squirrels out. It's really important to keep the air moving in both winter and summer. I also wash the panels of my greenhouse in the Fall and let the panels get dirty as it actually helps in filtering out some of the strong light we get here in the South. When I lived in Southern England and had a greenhouse I noticed in Summer that the angle of the sun was such that too much heat was never a problem as long as the roof vents were open.
Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so.
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