Greenhouse Window Opener, Automatic Roof Vent Opener Window Opener, Solar Heat Sensitive Greenhouse Auto Vent Opener Double Spring Aluminum Vent Lifts 15 Lbs

• 【Vital Parameters】Lifting force: max. 7kg/15lbs, Lifting height: max. 45cm/18in, Temperature range: 15°- 25°/60°-77F, Product Size: Approx. 33.5 x 4.5 cm / 13.2 x 1.8 in.
• 【Premium Material】Greenhouse window opener is made of aluminum and stainless steel, which is very study for long time use. High quality material makes it stronger, safer and more durable.
• 【Optimal Ventilation】As the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating.
• 【No Electricity Required】A mechanical system activated by heat that requires no batteries or electricity and uses solar energy to open or close the greenhouse's vents as the temperature rises or falls.
• 【Easy to Use】It is easy to use, can be clamped onto or screwed onto your greenhouse frame.Please make sure your greenhouse window can be opened freely by at least 45cm (18")

Specification: Item Type: Vent Opener Material: Aluminum Window Bracket Product Size: Approx. 33.5 x 4.5 cm / 13.2 x 1.8 in Temperature Sensing Cylinder Product Size: Approx. 34cm / 13.4in Weight: Approx. 436g / 15.4oz Start Opening: 25°C (77°F) Start Closing: 15°C (60°F) Open Temperature: 38°C / 100°F Maximum Opening Distance: Approx. 45cm/18in Fits Weight: Window or vent up to 7kg/15lbs Applicable: Suitable for any and most greenhouses Package List: 1 x Cylinder 1 x Window Opener Bracket 1 x English Manual 8 x Screw 4 x Accessories