Maximum window opening approximately 45cm/18 inch, Maximum opening at 30-38 Celsius,depending on adjustment and load. Window roof vent opener Suitable for greenhouse window up to 7kg (if more than 7kg, we recommend you to use two window opener), Start open at about 20-25 Celsius, when temperature above 25'C, the window opener will keep opening. once temperature drop to 15-18 Celsius, the window opener will totaly close.
Fully automatic greenhouse ventilation, window roof vent opener is Easy to fit - Screws into wood and clamps onto aluminium greenhouses without the need for drilling. (Full fitting instructions supplied), Window roof vent opener is Easy to set - one simple adjustment. Solar powered - No batteries or electricity required
Automatic window opener opens and closes your greenhouse vent panels, Raise or lower the temperature setting with a simple twist of the cylinder and can be adjusted from approximately 65 to 80 degrees Fahrenheit, No electrical power is required as the fluid-filled cylinders expand in warm temperatures, Screw directly into polycarbonate panels, wood, or metal frames.Put the cylinder in a cool place at max. 50 Fahrenheit for at least 30 minutes before the assembly.
Strong build, Loses no headroom, Anodised aluminium construction - All parts corrosion resistant. Spring controlled - Resists wind damage when opening and closing.Replacement cylinders of window roof vent opener are available.
Perfect for your greenhouse window--opens and closes your greenhouse window, as the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating.
Name: Automatic window opener
Material: Galvanized sheet
Package includes: 1* Automatic window opener
Only the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.