STR Fan Controller
Offering a silent way to reduce the airflow of a fan, the STR Voltage Stepping Fan Speed Controller is a robust and reliable addition to any grow room.
Manually adjustable through five different voltage levels corresponding to fan speeds, the advantage of the voltage stepper over variable resistors is the lack of hum created by the resistance.
As well as being unwanted noise, this hum is also a sign that the capacitors in the fan are being put under strain and their lifespan is being reduced. This is especially true when a variable resistor is used with the larger inline fans.
The STR Voltage Stepping Fan Speed Controller is available in either the 1.5A or 3.5A sizes, as a rough guide the 1.5A is fine for any of the RUCK fans including the 250L (High Power) which uses 0.9A. You could also use up to two 150L (High Power) using 0.5A each with a two-gang extension.
For multiple 200L (High Power) or 250L(High Power) RUCK fans you will need the 3.5A STR Voltage Stepper.