Automatic window opener

Keep your greenhouse perfectly ventilated with this automatic window opener. Using a temperature-sensitive wax cylinder, it opens and closes your greenhouse windows automatically — no electricity or batteries required. As temperatures rise, the opener gradually lifts the window to allow fresh air circulation, then gently closes it as temperatures cool.

Key Features:

• Fully automatic — operates on heat-sensitive wax technology
• No electricity or batteries needed
• Opens windows starting at approximately 60°F (15°C)
• Adjustable opening temperature and vent height
• Supports window weight up to 15 lbs (7 kg)
• Easy installation with included mounting hardware
• Ideal for maintaining optimal greenhouse temperature and airflow