Although this vent opener can be clipped onto the frame of aluminium greenhouses, if you want a more permanent fixing it can be bolted on. Or, to fix to wooden greenhouses use wood screws (not supplied).
This opener can be set to start opening the roof vent at any temperature between 12-18ş Centigrade/55-65ş Fahrenheit, giving a maximum window opening of approximately 12" (30cm).
Approximately 11" (28cm) long this automatic opener fits close to the greenhouse glass so doesn't protrude into the greenhouse (you won't bang your head!).
Suitable for lifting a load of up to 5.5kg (12lbs) with windows approximately 30" x 24" (76cm x 61cm) in size.
Covered by a 2 year manufacturer guarantee.
Supplied complete with comprehensive installation instructions.