XZKING Automatic Roof Vent Opener Dual Spring Greenhouse Accessories Solar Heat Sensitive Automatic Greenhouse Window Opener Replacement Greenhouse Vent Opener Greenhouse Opener for Ventilation

Working Condtion: The start open temperature can be adjusted from 15℃-23℃ ( 59℉-73.4℉ ).(Adjust:Rotate the cylinder clockwise to lower the open temperature or anticlockwise to increase open temperature.) When the temperature reaches 35℃ ( 95℉ ) or above, the window will be fully opened The maximum open distance, from window sill to bottom rail, is about 45cm (18”) Maximum weight of the window is 7kg (15.4 lb).

• Reliable Material: these automatic greenhouse window openers are mainly made of aluminium alloy material, reliable and reusable, sturdy and strong, not easy to break or rust, which can serve you for a long time and you can also use them with confidence.
  
  
• Double Spring Design: our solar heat sensitive roof vent opener adopts double spring design, which has stronger thrust force and more solid; In addition to ordinary areas, it can also be applied in windy mountainous areas, bringing much convenience to you. 
• Solar Heat Sensitive: the auto greenhouse vent opener will remain open, when the temperature exceeds 25 degrees Celsius, and the opener will close completely, when temperature drops to 15 to 18 degrees Celsius, using solar energy, no batteries or electrical power needed. 
• Widely Applicable: these greenhouse accessories are practical and useful tools, which can be widely applied for greenhouse windows and greenhouse vents in higher wind situations, maintaining the nice growing temperature and preventing your greenhouse from overheating.
• Storage and maintenance： All moving parts need to be lubricated after installation. Occasional lubricate is recommended. Please take off the cylinder from the opener when the window is not to be opened such as during winter time, to avoid any accident opening due to warm up climate. Lubricate and check the piston rod, make sure it can work smoothly if there is long time no work. The vent opener should be stored at a cool and dry place.