NOTE : Extra roof vent for Silver Mythos or Hybrid greenhouses only.
Increase the air circulation in your greenhouses. Supplement your greenhouse with an additional air vent to reduce humidity and improve air circulation to keep your greenhouse cooler on warm days. Provides additional air ventilation. Helps regulate temperature and humidity levels. Manual adjustment for variable airflow. Can be fitted with the Palram / Canopia automatic roof vent opener for optimal airflow.