Review on TerraBloom ECMF-150, Quiet 6" Inline Duct Fan With Variable Speed Controller – Ventilation Exhaust Fan For Heating Cooling Booster And Grow Tents by Amanda Thomas

The airflow is continuously variable, not stepped like an AC Infinity. For the energy usage the airflow is good. It makes good pressure and good vacuum no matter how you implement it. The propriety connectors are my only reservation (on the speed control pendant). It is useful though the unit can be used at full speed without the speed control pendant connected at all, and they provide a thread on cover to protect the port. I will purchase again when needed.