Dual Spring Automatic Greenhouse Window Opener Kit For Roof Vents With Solar Heat Sensitive Actuation, No Fuss Temperature Activated Ventilation, Rust Resistant Aluminum Build, Includes Microfiber Cleaning Rag Set For Easy Maintenance

Dual Spring Solar Greenhouse Window Opener Kit for Vents
✔️ Rust-proof aluminum, dual-spring action, solar actuation, 2-pack

These automatic window openers are designed for greenhouse roof vents and vertical vents, using solar heat to regulate internal temperatures without batteries or wiring. Made from rust-resistant aluminum, they hold up in wind and rain for long-term use.

✅ Material: rust-proof aluminum spray-painted cylinder and frame
✅ Temperature range: activates around 15°C to 25°C (60°F-77°F)
✅ Energy-free operation: no batteries or external power needed
✅ Dual spring design for stronger thrust and durability
✅ Pack includes 2 openers and 3 microfiber cleaning rags for maintenance
✅ Suitable for high-wind environments and general greenhouse use

💡 What is a greenhouse window opener and how does a temperature-activated vent work?

This handy device automatically vents greenhouse roof vents as temperatures rise, helping maintain the ideal growing environment. - It uses a temperature-sensitive mechanism to open vents - No external power required - Great for seed starting and preventing overheating