Automatic Louvre Opener
Making sure your greenhouse does not overheat whilst your at work or away on holiday.
How It Works - the stainless steel cylinder contains a mineral wax which expands with heat, causing the louvre vent to open. As the temperature falls the wax contracts, closing the louvre.
Opening Temperature Range - adjustable between 15 - 25*C / 59-77*F
Release Catch - allows the manual opening and closing of the louvre irrespective of the greenhouse temperature.