The Automatic Vent Opener was designed to automatically control the temperature and
humidity levels. It provides additional ventilation for all Palram - Canopia Greenhouses, making
gardening easier. As the air inside the greenhouse warms, the vent gradually opens to allow
the correct amount of airflow into the greenhouse until the optimal temperature is reached.
The vent arm was designed with the use of wax that expands with heat and contracts when it
cools. The Automatic Vent Opener operates without the use of electricity.
 
Opens roof vent automatically as temperature warms for air circulation and heat relief,
closes when temperature cools
Solar powered, heat activated - start opening point: 12°-15° 
Easy to install
 
 
Works with all Palram - Canopia Greenhouses only