ITEM NAME:Solar Heat Sensitive Auto Thermo For Window Open Greenhouse Vent Autovent A B8F4 Solar Heat Sensitive Auto Thermo For Window Open Greenhouse Vent Autovent A B8F4 Color: silver + black Type: Greenhouse Window Opener Material: Aluminum Alloy Fully automatic greenhouse ventilation Heat activated Fully adjustable to open between 15-25 C (60-77 F) Open window fully to 350mm Suitable for windows up to 7kg Easy fitting by clamps or screws provided No batteries or electricity required Feature Temperature controlled sensor cylinder enables roof vents to be opened and closed at the appropriate time, ensuring sufficient airflow Universal fit - suitable for any aluminium frame and wood frame greenhouse Simple and effective way to provide extra ventilation for your greenhouse Easy to install Bad weather can quickly closed the window Detail Both the frame and cylinder is made of Aluminum, longer using-life. Even the surface was scratched, the window opener will not get rusty. Package Contents: 1 * double spring window opener
