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Halls Automatic Roof Vent Opener

Buy this Halls Automatic Roof Vent Opener to automatically open your greenhouse roof vents to effectively ventilate your greenhouse and prevent excess humidity.

The autovent`s cylinder is filled with wax that liquefies as it heats up, automatically opening your roof vent and then closing it as the temperature drops later in the day.

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0800 098 8877

Buy this Halls Automatic Roof Vent Opener to automatically open your greenhouse roof vents to effectively ventilate your greenhouse and prevent excess humidity.

The autovent`s cylinder is filled with wax that liquefies as it heats up, automatically opening your roof vent and then closing it as the temperature drops later in the day.

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