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Switch to disable one vent in winter ?

18 years ago

I'm planning a roughly 9x14 GH. I have already bought two Dayton motorized 16" shutters and one 16" shuttered fan. Of the several "fan size/ vent calculators" I found to use, each reported slightly different suggestions, so I went up rather than straddle the fence.

Clearly I have more than enough "make up air" for the fan size and will run the fan with speed can get hot here on *some* summer days, yet it is usually "edge of coastal area" moderate.

Question is: I've read that intakes of cold air in the winter can be harmful to the plants (I plan an intermediate range GH temp). It doesn't snow here, nor does the frost in winter usually last beyond 9 AM so, but can have bright cold days (well cold for CA, like 40 degrees)

Is it a good idea to wire the shutters so that I can disable one of them during the winter and reduce the amount of cool/cold air entering when the fan kicks in?

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