Automatic Vent Opener




  • Would You Like To Be Able To Maintain An Ideal Temperature In Your Grow-Fresh® Greenhouse No Matter What The Season.

    Our dual spring automatic vent openers provide the ventilation your greenhouse needs which is essential for the growth of healthy disease free plants.

    They also allow you to adjust the temperature within your greenhouse without having to be home. They can be adjusted to open and close within a temperature range of 18-25ºC simply by screwing the piston in or out.

    How Do They Work? Firstly, there is no need for any electricity. As the ambient temperature increases, the mineral wax within the cylinder expands. This slowly pushes the stainless steel piston outwards, thus opening the roof vent. This will allow the temperature within your greenhouse to be regulated without having to lift a finger!

    Having these automatic vent openers means you will never have to quit gardening due to weather conditions. We know how temperamental and harsh our Australian climate can be. From the colder south to the extreme north of the country, by installing the automatic vent openers you will be able to enjoy cheap fresh produce all year round.

    Our Automatic Vent Openers are universal and can be easily installed into most brands of greenhouses. This listing does not include actual vent, only the self opening mechanism.

    • Fully Automatic Heat Activated Greenhouse Ventilation
    • Fully Adjustable To Open Between 18-25ºC
    • Opens Windsor Fully To 450mm
    • Suitable For Windows Up To 10kg
    • Easy Fitting With Screws/Clamps Provided
    • No Batteries Or Electricity Required
    • Dual Spring For Tighter Window Closure