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The GAS Step Controllers are the best AC fan controllers available. Quiet, simple to use and the most efficient way to regulate your AC fans, with no clicking between steps like other AC fan controllers.
The digital controller technology with solid state relays create a top quality 5 step transformer. Made in Europe to the highest quality standards, the silent seamless changes between steps removes the loud clicking that some controllers have. The Pro Plus Controller has the same top quality transformer and silent step transitions as the pro version.
It has the addition of a heater control that works in unison with the fan controller. Keeps your grow room close to your set temperature all the time.