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Imagepsa
Feb 24, 2010 2:44 AM CST
Name: Paul
Eastern WA
DG: tropicalaria
The fan has been constantly running essentially since I put it up a couple years ago. In the summer I direct it downward and in the winter I direct it up. Either way, the leaves in the greenhouse show a constant rustling and I'm satisfied that the circulation is adequate. Thermometers placed at various heights and distances from the center have shown an even temperature in both hot and cold weather. Perhaps the greatest advantage to this arrangement has been that I can place strong fans next to the door and keep the internal temperature within 5 degrees F of the outside even in the heat of summer without the top vent that I always assumed would be necessary.

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