On Mar 22, 2007, at 17:27 PM, Thomas Hillson <[EMAIL PROTECTED]> wrote:
Mark, Unfortunately, I tried moving the air to the floor, but the times I tried it, my entire greenhouse went over 90 degrees, way to hot for my cool growing species that I like to keep no more than 60 to 70 this time of year. If I did not have a varied collection of orchids this would be easier, but I have over 250 genera and lots of hybrids in my collection. Most of them are Paph species and Paph hybrids, I also have a lot of Pluerothallids, and a heterogeneous collection of other things. I love the unusual, that is part of why I like orchids. I like the idea of more roof vents, but I want to work on a way to shield them from the north and west winds we get here as I found them to drive the cold air under roof vents in the winter. I had some roof vents on my old greenhouse, but I did not replace them when I put new lexan the greenhouse two years ago as I was looking to save heat and keep the greenhouse warmer. The problems I have found with my greenhouse is you want to keep the heat in at times and you want to get rid of it other and it is really hard to do both well. Any one have any roof vents with a baffle or other protection around it or any ideas on how to seal a vent better than the normal ones that just lay on top of the greenhouse. I am enjoying this discussion, I hope we can come up with some good ideas that will help more people. thanks, Tom Tom et al, We have had installed as a part of our computer automation controls that, depending upon wind direction and speed, lock one side or both roof vents on each of our three houses down. It is probably cost prohibitive for the backyard collector, but may be a solution. Being commercial we couldn't manage without the whole computer automation set up - we just need to keep a close eye on things making sure they're doing what they are supposed to. Ross & Susan Tucker Tuckers Orchid Nursery Ltd Auckland, New Zealand
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