The 5 speed settings of these reliable fan controllers allow Intake

and Extraction fan speeds to be set to maintain negative pressure

in the grow room (to stop odour escape).

The British built Silent range of Rhino Fan Controllers eliminate

buzzing and humming.


  • Scans the environment every 20 seconds to determine the best fan speed for the set optimum temperature.
  • Fan speed is adjusted in steps to achieve the set temperature withou shocking the plants.
  • When the set temperature is reached the controller adjusts fan speed to the set minimum fan speed.

Rhino 2a Thermostatic Fan Controller