For all orders exceeding a value of 100USD shipping is offered for free.

Returns will be accepted for up to 10 days of Customer’s receipt or tracking number on unworn items. You, as a Customer, are obliged to inform us via email before you return the item.

Otherwise, standard shipping charges apply. Check out our delivery Terms & Conditions for more details.

Compared with the single-spring exhaust port, the dual-spring exhaust port has stronger thrust, stronger and more durable. The double spring vent opener can be closed manually.

Lengthened aluminum cylinder, painted, weather resistant. Stainless steel accessories can be used for a long time. The aluminum frame looks more shiny, durable and anti-rust.

Easy to install, suitable for all aluminum frame greenhouses. Suitable for vents weighing up to 7 kg/15 lbs.

The solar thermal vent opener automatically stretches or contracts the vent when the temperature changes.

The automatic opening temperature range can be adjusted between 15-25°C (60-77°F) by rotating the cylinder. (Clockwise is high, counterclockwise is low). The maximum opening is about 30°C/86°F (depending on regulation and load).