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: alloy aluminium 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.
