👍【Double Spring Design】Our solar heat sensitive roof vent opener adopts double spring design, which has stronger thrust force and more solid; You can use two window openers together, it can be applied not only in ordinary areas, but can also in windy mountain area, resist wind twist. Stronger Force, lifts up to 30Lbs. 👍【Temperature-Sensitive Ventilation】Our automatic window opener will automatically open and shut your greenhouse window to maintain the best growing temperature and preventing your greenhouse from overheating, efficiently regulating your greenhouse's internal climate. 👍【Premium Material】Featuring an aluminum spray-painted cylinder, the solar window opener is built to last and withstand harsh weather conditions. Aluminum frame looks more lustrous, durable and rust-proof. Stainless steel accessories would guarantees long-lasting performance. 👍【Wide Temperature Range】Operating between 15°C to 25°C (60°F - 77°F), the opener adapts to various weather conditions. It achieves a full opening at temperatures above 30°C (86°F) and offers a maximum vent distance of 45cm (18"). Do not use this opener anywhere the temperature will exceed 60° (140 f). 👍【Ideal for Your Greenhouse Window】You will receive 2pcs of automatic greenhouse vent openers, enough quantity to meet your needs and replacements. Each opener comes with a fitting accessory pack and a detailed manual for easy installation.

Automatic Roof Vent Opener Greenhouse Accessories Solar Window Louvre Thread Opener, Up to 30lbs (Dual Spring Opener) 

Features:

Prevent greenhouse overheating.

Ideal 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.

Non electric, uses solar energy, open or close the greenhouse vents as temperature rises or drops.

Can be clamped onto or screwed onto your greenhouse frame.

 

Specifications:

Material: Aluminum Alloy

Fully adjustable between 20 - 25 ° C (68 - 77 ° F)

Maximum window opening: 45cm / 18 inch

Maximum opening weight: 7kg/15lb

Size: Approx. 38x9.5x5cm / 15.0x3.7x2.0in

 

Package:

2 x Automatic Window Opener Kit 

 

Notes:

Do not use this opener anywhere the temperature will exceed 60° (140F)

Please ensure your greenhouse window can be opened freely by at least 45cm (18")

Do not apply excessive loads by locking or covering window

Do not dismantle the cylinder

The opener CANNOT stop by manual

Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.