Double Spring Automatic Vent Opener

Product Overview

Description

Double Spring Automatic Vent Opener

 

1. Fully automatic greenhouse ventilation

2.Fully open distance 45cm (18 '')
3.Fully adjustable to open between 15-25C (60-77 F)
4.Suitable for windows up to 15kg( 30lbs  )
5.Easy fitting by clamps or screws provided
6.No batteries or electricity required

7. With two SS springs.  

8. With the automatic window openers, you can be sure of an even temperature in your greenhouse day and night. They allow thermostatic ventilation control through the roof windows of your greenhouse.   

9. Replacement cylinders are available.

 

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