Greenhouse Automatic Roof Vent Opener Replacement Cylinder, Non - Electric Temperature Sensor, Solar - Powered Ventilation Control for 15-25°C Greenhouse Windows

Features:Made of quality material, durable, solid and convenient to use. As the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating. Non-electric, uses solar energy, open or close the greenhouse vents as temperature rises or drops. Ideal for your greenhouse window. The temperature is automatically adjusted from 15 to 25 °C. Specifications:Item Type: Greenhouse Winder Opener Cylinder Color: Sliver + Black Temperature range 15°- 25°/60°-77FSupport rod total length: 33.5cm / 13.19 inch (appr.), the largest diameter: 1.5cm / 0.59 inch (appr.)Double spring window opener (closed state) total length: 32cm / 12.60 inch (appr.)(Open state) width: 24.7cm / 9.72 inch (appr.)Package List:1 x Greenhouse Winder Opener CylinderNotes:Do not use this opener cylinder anywhere the temperature will exceed 50° (122F).Do not dismantle the cylinder.This products need to be refrigerated before use it.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.

• Automatic Temperature Regulation: This greenhouse automatic roof vent opener replacement cylinder responds to ambient temperature changes between 15°C and 25°C (60°F–77°F), automatically opening or closing vents to maintain optimal growing conditions without electricity or manual intervention.
• Solar-Powered & Non-Electric Design: The automatic roof vent opener uses thermal expansion from solar energy instead of batteries or wiring, making it a reliable, eco-friendly solution for consistent greenhouse ventilation in off-grid or remote garden setups.
• Ideal for Greenhouse Environments: Designed specifically for greenhouse windows, this vent opener helps prevent overheating and ensures steady airflow for vegetables, flowers, and seedlings, making it perfect for home gardeners, hobbyists, and small-scale growers.
• Durable Metal Construction: Made of high-quality silver and black metal alloy, the replacement cylinder features a solid build with dual springs for smooth operation, long-lasting performance, and resistance to in humid greenhouse conditions.
• Easy Installation & Dimensions: The greenhouse automatic roof vent opener includes one replacement cylinder with a support rod length of approximately 33.5 cm (13.19 in) and max diameter of 1.5 cm (0.59 in); simply mount it to your existing vent frame—no tools or wiring required.