Description:
Ingenious temperature-sensitive automatic vent opener can automatically open and close window frame, really works well in maintaining the greenhouse within the preferred temperature range. The vent opener starts opening between 15-25℃ (60-77℉), depending on how you have adjusted the cylinder.

Features:
[Automatic Vent Opener] Greenhouse windows opener can open and shut your greenhouse window automatically to maintain the best-growing temperature and prevent your greenhouse from overheating.
[Wide Applicability] The vent opener can be closed manually and is easy to install, fit for most aluminum frame greenhouses.
[Adjustable Temperature Range] Temperature range is adjustable from 15-25℃ (60-77℉) by turning the cylinder, maximum opening at about 30℃/86℉ (depending on adjustment and load).
[High-quality Construction] Durable and rust-proof Iron windows opener with paint spraying for last long-time use.
[15lb Load Bearing] Use the Standard Vent Opener to lift up to 7kg / 15 lbs.

Specifications:
Material: Aluminum, Stainless Steel
Color: Black

Star open at：15-25℃ (60-77℉)                                             

Fully open at: 30℃/86℉                              
Max open distance: 45cm/17.71inch
Load bearing: 7KG / 15lb
Cylinder Length: 33.8cm / 13.3inch
Package Size: 37.5*9.8*4.5cm / 14.76*3.85*1.77inch
Package Weight: 439g / 0.96lb

Package List:
1 * Automatic Vent Opener
1 * Cylinder
1 * Package of Accessory
1 * Manual (English)

Note:
Do not heat to more than 50℃ (122℉).
Do not apply excessive loads by locking or covering window.