Vérin pour Serre Hautement Sensibles Vérin Serre Automatique Ressorts Simples ou Doubles pour Ouvreurs de Fenêtres Automatiques Accessoires (Accessoires)

Automatic Window Opener: Ideal for greenhouse windows, the automatic window opener opens and closes greenhouse windows with automatic temperature changes. It maintains optimal growing temperature and prevents the greenhouse from overheating.
Non-electric: Requires no electricity, uses solar power and opens or closes vents as greenhouse temperatures rise or fall. Save energy and time without manual handling.
Easy to install: can be clipped or screwed onto the greenhouse frame;Make sure your greenhouse windows open freely at least 13 inches (33 cm).Do not apply excessive load when locking or covering windows
Environment: you do not need electricity in your greenhouse;The window openings will be very ecological and CO2 friendly throughout their lifespan
Cylinder Temperature Sensor Replacement: Our famous hydraulic cylinder replaces our small range of sashes, the core technology is a hydraulic cylinder containing vegetable wax, this specially designed cylinder containing this wax can work as a thermostat for sashes of greenhouse, so no power supply is required.