Grandio Greenhouses Sale

Toll Free: 1-866-448-8231

Grandio Automatic Window Opener.

Automatically opens and closes the roof vent window when temperature changes. The opener has a metal cylinder containing a mineral which expands when heated. This pushes a piston that opens the vent. As the temperature cools, the mineral shrinks and a spring closes the vent and resets the piston. The opening and closing of the vent is gradual allowing just the right amount of air flow for cooling.

Window Opener:


Availability: In stock and ready to ship

Replacement Cylinder:


Availability: In stock and ready to ship
  • Shipping Weight: 1 lbs

© 2012-2017 - All Rights Reserved.  - Privacy Policy