After installing this controlled automatic vent opener, your window will be self-opening. It is vulnerable to solar heat, so the air vent opens when the weather heats up, and when it cools down. It really works well to maintain greenhouse within a preferred range.
Features:
Compared to single spring vents, the double ones have stronger thrust power, stronger and much more durable.
Double spring vent opener can be manually closed.
Elongated aluminum cylinder with weather-resistant paint spray.
The solar heat sensitive vent opener automatically expands or contracts the vent while changing.
Stainless steel accessories will last.
The aluminum frame is more shiny, durable and rust resistant.
Easy to install and universal fit in all aluminum frame greenhouses
The auto-open range can be adjusted from 15 to 25 degrees Celsius (60 to 77 degrees Fahrenheit) by rotating the cylinder. (The high side will turn clockwise, the lower one is counterclockwise).
Maximum opening at approximately 86°F (30°C) (depending on adjustment and load)
Suitable for heavy air vents up to 7kg/15
Specifications:
Material: Aluminum + SS
Item Weight: Approx. 13.26 oz (376 g).
Package Weight: Approx. 15.49 oz (439 g).
Package Size: Approx. 14.96 x 3.74 x 1.77 inches (38 x 9.5 x 4.5 cm).
Package List
1 x vent opener.
1 x Accessory Package
1 x Manual (English)
Note:
Do not exceed 50 degrees Celsius.
Do not disassemble cylinders.
Allow cylinder to cool for 24 hours before installation