Vortex Inline Duct FanTried and Tested Grow Room Extraction Fans The Vortex Inline Duct Fan is a dependable extraction fan designed to keep air moving through your grow room or grow tent. Using proven AC fan technology, it delivers strong, consistent airflow to remove heat, humidity and stale air from your growing environment. Good ventilation is essential for healthy plants, and a reliable inline extractor fan keeps temperatures stable, helps manage humidity and ensures