2 Pack Greenhouse Auto Roof Vent Opener Heat Sensitive Single Spring 15 Lbs

About this item

• Automatic Thermal Ventilation for Greenhouse Roofs: This temperature controlled auto vent opener features a thermal piston that auto opens and closes roof vents with temperature changes. Maintain steady fresh airflow for your plants with this hands-free greenhouse ventilation accessory.
• Rustproof Aluminum & Stainless Steel Heavy-Duty Frame: Crafted from corrosion-resistant aluminum and stainless steel, this durable greenhouse accessory works great in humid growing spaces. The single spring vent opener holds up to 15 lbs (7 kg) and lifts vents up to 18 inches((45 cm) wide for long-term garden use.
• 100% Solar Heat Powered, No Electricity Needed: Non electric, our window vent opener uses solar energy. Operating between 15°C to 25°C (60°F - 77°F), the greenhouse vent opener works when the temperature exceeds 77°F /25°C, solar vent opener will open. while temperature drops to 59°F /15°C, the greenhouse kit will shut down completely.
• Quick Clamp Mount & Stepless Adjustable Opening Angle: Included clamps and screws let you install this greenhouse auto vent kit on metal, wood and panel frames quickly. Rotate the cylinder for stepless adjustable vent opening to match your agriculture gardening needs.
• Universal Fit & Simple Pre-Install Break-In Instructions: Suitable for most common garden greenhouses, this must-have greenhouse supply delivers stable responsive ventilation. Chill the cylinder for 30 mins, stretch and retract manually before mounting for optimal performance.