Vent Openers

Greenhouse Fans, Louvres, Vent Openers and Shading: Vent Openers

Vent Openers

Extremely reliable Automatic Vent Openers suitable for wooden or aluminium greenhouses. Fitting neatly close to the glass the openers do not protrude into the greenhouse - so you do not bang you're head!

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Super Bayliss MK 7 Vent Opener

Super Bayliss MK 7 Vent Opener

This extremely reliable automatic vent opener, the Bayliss MK7 Super has been designed to lift very heavy double-glazed windows weighing up to 35 lbs. (16kg).

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Bayliss MK 7 Hydraulicheck Vent Opener

Bayliss MK 7 Hydraulicheck Vent Opener

The Bayliss Hydraulicheck Vent Opener has a small hydraulic damper which causes the vent to open slowly but to close very quickly making the opener suitable for use on greenhouse roof vents in exposed areas, the unique damper will prevent the vent from being wrenched open in high winds and subsequently damaged.

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Bayliss MK7 Autovent

Bayliss MK7 Autovent

The Bayliss Mk7 Greenhouse Autovent is approximately 29cm long and will lift a vent weighing up to 6kg. It can be set to start opening at any temperature between 12-25C, giving a maximum opening of approximately 30cm.

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Bayliss MK7 Triple Spring Autovent

Bayliss MK7 Triple Spring Autovent

The MK7 Triple Spring Autovent uses the same mechanism as the MK7 but with two additional springs giving extra closing force. Ideal for top hinged side windows, light roof vents (like uPVC windows) or roof vents in very windy areas.

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Bayliss XL Autovent

Bayliss XL Autovent

This Bayliss XL is an extremely reliable automatic vent opener. The opener is activated by a stainless steel cylinder containing a mineral wax which expands with heat; this pushes a piston causing the vent to open. As the temperature falls the wax contracts and a strong stainless steel spring closes the opener.

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