Nicholas Plummer via pbs
Sun, 10 Jan 2021 08:13:25 PST
I have used misters for cooling in the past but found that they left the greenhouse too wet.  Since 2007, I have used a free-standing swamp cooler and have found it to work well, even in the humid southeast.  The plants stay dry, and the small opening in the greenhouse is easier to insulate in winter than a full wet-wall would be.

I have a 2-stage thermostat so that vents open first, and the cooler fan only turns on if additional cooling is required.

Here’s a link to the model I use:…


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