Nicholas, I am not sure I am following you or I am missing something. You ask: My primary concern is how to insulate it on winter nights while still being able to vent the greenhouse on sunny winter days?
The system you linked to: I'm considering a wet wall system (e.g. http://www.greenhousemegastore.com/prodinfo.asp?number=GCCS). Looks like it operates inside a greenhouse. I don't think you are going to allow your greenhouse to get bellow freezing so I don't know why you would have to insulate it. For what its worth, I use ( http://www.microban.com/americas/products/manufacturer.html?lang=en&CategoryID=3&SubcategoryID=50&ManufacturerID=196 ) this evaporative cooler within my greenhouse and against a vent. I works very well. The pads last a long time, and the inner water well does not grow algae. I have yet to have a problem with the pumps and fan (two years). Mark Sullivan _______________________________________________ the OrchidGuide Digest (OGD) [email protected] http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com
