Tennis,
You want the air to come into the greenhouse by the fans and to go out through the roof vents. The hot air will be above the plants, you want it to rise up and out through the vents. Or you have the fans mounted high on one end to pull the heat out of the greenhouse. If the fans are mounted high they may pull some air into the greenhouse through the vents. It depends on how you have it setup.
Tom Hillson
At 12:41 AM -0500 3/31/05, tennis wrote:
I am appreciative of the replies to my query, and have a further, though simple, question which is puzzling me. Perhaps I'm missing something really basic here, but I do plan to have solar powered peak vents, which, as I am making them myself (not the openers, just the vents) will surely leak like sieves. I have decided the practicality of having a large exhaust fan on the roof is offset by the difficulty and will probably go the standard route of vents and fans on opposite ends of the GH at bench height (maybe a few vents at floor level too). My question is this: when the fans kick on, as the peak vents will already be open, am I not just pulling air through them down into the GH and not from the opposing bench level vents which are further away, depriving the plants at that end needed circulation and cooling?
Tennis Maynard
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