Glasshouse Auto Vent Opener

These automatic vent openers are designed to fit current-models of the Regency, Regal and Sovereign ranges of glasshouses. The vents open and close automatically as the temperature inside the glasshouse increases and decreases. This is due to the expansion and contraction of a heat-sensitive wax in the activating piston. This system requires no electricity to work.

Installation instructions are provided below.