Description
Mission Controls BasicFan 6.5 Amp Speed Controller is a manually adjustable fan speed controller for AC inline fans, allowing stepless speed reduction from maximum down to a minimum setting for climate management in grow rooms and tents. We have been recommending fan speed controllers to UK growers since 2017 as an essential piece of grow room equipment — the ability to run an extraction fan at less than full speed allows you to fine-tune the balance between temperature, humidity, and CO2 levels in the growing environment rather than accepting the binary choice of maximum extraction or no extraction that a direct-wired fan provides.
Why Manual Fan Speed Control Improves Grow Room Climate Management
A grow room’s ventilation needs vary significantly across the photoperiod cycle and across seasons. During the lights-off period in winter, maximum extraction speed may chill the room below the optimal temperature for plant growth, slowing root zone activity and creating temperature stress. During the peak of a summer lights-on period, maximum speed may be insufficient to control temperature without CO2 enrichment. A manually adjustable controller allows you to find the fan speed that achieves your target temperature, humidity, and CO2 balance under the actual conditions in your grow space at any given time. The BasicFan 6.5 Amp rating covers the current draw of most standard 150mm and 200mm AC inline fans commonly used in UK home and small commercial growing environments. The stepless control range allows fine adjustment rather than the crude high/medium/low steps of switched controllers.
How to Use the Mission Controls BasicFan Speed Controller
Connect your AC inline fan to the controller outlet, then connect the controller to your mains socket. Turn the adjustment dial to set the fan speed — rotating toward minimum reduces speed, toward maximum increases it. Set initially to achieve your target temperature and humidity under current ambient conditions, and re-adjust seasonally as ambient temperatures change. The BasicFan controller is designed for AC induction motor fans only — do not use with EC motor fans, which require an EC-specific controller. Always ensure the connected fan’s current draw is within the 6.5 amp rating of the controller.
Pair the Mission Controls BasicFan with a RAM or Revolution AC inline fan, carbon filter, and a thermometer/hygrometer for a simple, well-controlled grow room ventilation setup. Browse our full range of fan speed controllers and environmental control equipment.







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