greenhouse heating and ventilation
We have an 8' X15' green house that houses about 50 cattleyas and some odds and ends. I read that their culture requires temperature about 75* in the day and 55* at night. How important is the day/night differential and where do you find a thermostat for a greenhouse that has day/night programability? Also, I read that air circulation is important. Does this mean you run a fan 24/7 or just during the day and set it on a timer? Thanks for your thoughts.
Ed
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