Greenhouse Automatic Roof Vent Opener Kit, Heat Sensitive Cylinder Replacement Roof Vent Opener Lifter Autovent Vent Opener Standard Two Springs

Product Description: this solar vent opener is an automatic device for greenhouse windows that uses a thermal cylinder to open and close a vent based on temperature. constructed from aluminum and stainless steel, it includes a bracket and hardware for installation, starts opening at approximately 25°c (77°f), and is designed to help regulate temperature and prevent overheating in a greenhouse.Features 1、[Solar Powered] A mechanical system activated by heat that requires no batteries or electricity and uses solar energy to open or close the greenhouse's vents as the temperature rises or falls. 2、[Automatic Temperature Control Sensor] Automatic temperature control sensor cylinders that allow roof vents to open and close at the appropriate time to ensure adequate airflow. 3、[Premium Material] Greenhouse window opener is made of aluminum and stainless steel, which is weather resistive for long term use. 4、[Quick Open And Close] Automatic vent opener opens and closes greenhouse window quickly and can be clipped or screwed onto your greenhouse frame. 5、[Prevent Overheating] With automatic temperature changes, the ideal growing temperature is maintained and the greenhouse is prevented from overheating.Specification Item Type: Vent OpenerMaterial: AluminumWindow Bracket Product Size: Approx. 33.5 x 4.5 cm / 13.2 x 1.8 inTemperature Sensing Cylinder Product Size: Approx. 34cm / 13.4inWeight: Approx. 436g / 15.4ozStart Opening: 25°C (77°F)Start Closing: 15°C (60°F)Open Temperature: 30°C / 86°FMaximum Opening Distance: Approx. 45cm/18inFits Weight: Window or vent up to 7kg/15lbsApplicable: Suitable for any and most greenhousesPackage List 1 x Cylinder1 x Window Opener Bracket1 x English Manual8 x Screw4 x Accessories

• Solar-Powered Thermal:This solar greenhouse ventilation opener uses a sealed cylinder filled with a waxy substance. The waxy substance expands when heated and contracts when cooled, mechanically pushing a piston to open and close the ventilation opening.
• Solar Heat Sensitive:No electricity is required; our window ventilator operates on solar power. It automatically adjusts the temperature range from 15 to 25 degrees Celsius. When the temperature exceeds 25 degrees Celsius, the window ventilator will remain open.
• Durable Aluminum and Steel Build:This aluminum greenhouse window opener uses an aluminum bracket and stainless steel cylinder and piston assembly. All materials used are suitable for outdoor environments and can withstand wind, rain and humidity.
• Helps Prevent Greenhouse Overheating:This greenhouse ventilation accessory automatically opens the vents to expel hot air when a set temperature threshold is reached, thus preventing the greenhouse interior temperature from becoming too high.
• Easy Installation:This ventilation opener, designed to prevent greenhouse overheating, comes with a window bracket, eight screws, and four accessories. It can be secured in place by clips or screws and is compatible with most greenhouse frames.