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Do all roof light openers activate at the same temperature?
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Most have a certain amount of adjustment but this is more to ensure it closes shut I think. I don't think it could control the temperature in the greenhouse to any great accuracy. That would be better achieved by a thermostatically controlled fan with an air conditioner. -
They can be adjusted to suit the temp you want it to open, it is to do with the gas in the piston expanding & contracting, I think.
Automatic Greenhouse Vent Openers & Circulation Fanssigpic“Gorillas are very intelligent, but they don't have to be as delicate as chimps -- they can just smash open the termite nest,”
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I assume you mean auto openers on greenhouse windows? Mine is controlled by a piston which can be roughly calibrated to the temperature you want. Takes a bit of setting up each year but when sorted works very well. I have one on my roof window and side vents and have them set at slightly different temperatures which suits the ventilation for my greenhouse well.
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