Double springs Black powder coated Aluminium automatic window opener
Fully automatic greenhouse ventilation
Heat activated
Temperature controlled sensor cylinder enables roof vents to be opened and closed at the appropriate time, ensuring sufficient airflow
Universal fit - suitable for any aluminum frame and wood frame greenhouse
Simple and effective way to provide extra ventilation for your greenhouse
1. Material: Aluminium with black powder coating and stainless steel 2. Star open at: 20-25℃ (68-77℉) 3. Fully open at: 38-40℃ (100-104℉) 4. Fully close at: 15℃ (59℉) 5. Max open distance: 45cm/18'' 6. Loading: 7kgs/15lbs 7. Easy fitting by clamps or screws provided. 8. No batteries or electricity required.
