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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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For large roof vents weighing up to 35lbs. 

Bolts on to aluminium greenhouses (fixings supplied) - for wooden greenhouses it is attached by wood screws (not supplied).

Fitting neatly close to the glass the opener does not protrude into the greenhouse (so you don't bang your head!).

An aluminium unit approx. 15 3/4" (39cm) long. 

Exerts a load of 35lbs (16kg) i.e. it will lift a vent weighing up to 70lbs (32kg).

Can be set to start opening the vent at any temperature between 16-25 Degrees Centigrade/60-75 Degrees Fahrenheit, giving a maximum window opening of 15" (38cm).

Operated 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.

Supplied complete with comprehensive installation instructions. 
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Bayliss guarantee their openers for 2 years but if anything should go wrong after that replacement cylinders are readily available & easy to fit. 
Click Here to see full and comprehensive fitting instructions for this Bayliss Vent Opener.