• Automatic Thermal Vent Opener

Automatic Thermal Vent Opener

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Automatic Vent Opener for Greenhouse Roof Vent

(One Needed for Each Window Vent)

Suitable for most Greenhouses

  • As ventilation is vital to climate control in the greenhouse, these handy Automatic Roof Vent Openers are an accessory that will make your life so much easier!!  
  • Your roof vents will open automatically when temperatures increase and they will close when the temperatures fall, preventing your greenhouse from overheating. Automatically!  
  • This vent opener has a unique thermally powered piston.  The wax material inside the piston expands when heated and pushes the vent open.  It contracts again when it cools down, allowing the vent to close.
  • It requires no electricity and has no batteries or motors to fail.
  • It will open and close between 15°c - 25°c with an opening distance of 45cm and will support a weight of 7kg. 
  • All you need to do is install it on your roof vent window and it automatically starts working.  The temperature at which it starts opening and closing can be adjusted by turning the piston to tighten or loosen the mechanism.
  • Comes with an instruction manual for easy installation! 


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