Extremely reliable Automatic Vent Openers suitable for wooden or aluminium greenhouses and guaranteed for 2 years. Fitting neatly close to the glass the openers do not protrude into the greenhouse - so you don't bang you're head!

Bayliss MK7 Autovent

The Bayliss Mk7 Greenhouse Autovent is approximately 29cm long and will lift a vent weighing up to 6kg.

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Bayliss XL Autovent

This unit can be simply clamped onto aluminium greenhouses without any drilling, or bolted on using existing holes or drilled holes.

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MK7 Triple Spring Autovent

Using the same mechanism as the MK7 but with two additional springs giving extra closing force.

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Bayliss MK 7 Hydraulicheck Vent Opener

An extremely reliable automatic vent opener the Bayliss Hydraulicheck has a small hydraulic damper which causes the vent to open slowly but to close very quickly making the opener suitable for use on very light or conventional roof vents to stop any "twisting" and to prevent the vent from being wrenched open in high winds.

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