The Airware fan speed controller provides simple manual adjustment of compatible single-phase inline fans. A rotary dial allows the user or installer to reduce or increase fan speed to balance airflow, operating noise and energy consumption for the application. The compact surface-mounted enclosure keeps the control accessible for commissioning and day-to-day use, making it suitable for bathrooms, kitchens and general residential or light-commercial ventilation systems. Compatibility and minimum controllable speed should be confirmed against the connected fan before installation.