Passive ventilation works on a scientific principle, using the buoyancy of hot air and the wind to encourage airflow through the domes. It comes pre-installed on the Sandwich Panel at the upper rows of the dome.
This valve style ventilation can be closed anytime when not needed. When kept open, moist stale air is extracted and replaced with fresh, clean air. Its mesh interior will prevent the unwanted creatures out of your dome.
This Passive Vent is only available for PRO Series domes, for all 4 models: LUNA, TERRA, STELLAR and COSMOS.