
This Halls Automatic Louvre Vent Opener will automatically open your louvre vents to allow cool air in to moderate the temperature inside your greenhouse, preventing excess humidity.
The autovent`s cylinder is filled with wax that liquefies as it heats up, automatically opening your louvre window vent and then closing it as the temperature drops later in the day.
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This Halls Automatic Louvre Vent Opener will automatically open your louvre vents to allow cool air in to moderate the temperature inside your greenhouse, preventing excess humidity.
The autovent`s cylinder is filled with wax that liquefies as it heats up, automatically opening your louvre window vent and then closing it as the temperature drops later in the day.
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