Ventilation for greenhouses

In a greenhouse ventilation is very important for temperature and humidity control as it allows the stale air to leave and be replaced by fresh air, one way to do this is to use an automatic vent opener by using this efficient way to control the opening and closing of your greenhouse vents is much easier than doing it manually.

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They work by using the weather temperature to control the automatic vent opener, the cylinder of wax drives a piston which will expand or contract depending on what the temperature is.

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