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Dimensions: 8ľ" (22cm) long body. For roof vents weighing up to 12lbs, approx.30" x 24" (76cm x 61cm).

Exerts a load of 11lbs (5Kg) i.e. it will lift a vent weighing up to 22lbs (10Kg).

Can be set to start opening the vent at any temperature between 12-18ş Centigrade/55-65ş Fahrenheit, giving a maximum window opening of 12" (30cm).

Supplied complete with comprehensive installation instructions.

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Any models of the Bayliss XL purchased prior to 2017 have a different design and this cylinder will not fit. Rather the whole unit will need to be replaced.


Click Here to see full and comprehensive instructions for fitting this Bayliss Cylinder.