[OGD] Greenhouse venting/fans

[tennis]

As I enter the final stages in what seems to be an endless period of 
planning for a new greenhouse, I am attempting to finalize such design 
details as air flow/venting and heating, etc. I would like to hear from 
anyone knowledgeable and experienced in this area. It has occurred to me 
the most effective way to vent an overwarm 24' x 12' greenhouse in the 
summer here in Ohio would be to put the venting fans venting through the 
peak roof of the GH  as near the center of the structure as possible, 
and have vents all around the edges, at floor level and bench level.

Sort of the 'whole house attic exhaust fan' idea. Of course, steps would 
have to be taken to keep the rain off, but other than that, any reasons 
why this wouldn't be the best method for venting heat, and having air 
flow over all of the plants in the GH? I will have three levels of 
plants (floor, bench, and above-bench shelf + hanging) and the normal 
'vent at one end, fans at other', at bench height just doesn't seem to 
fit. I had planned on a wetwall  for cooling, but have decided misters 
in front of intake vents would be as good and easier to manage, which 
enables the vents to be spread out as well.

Tennis Maynard

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