Trolmaster Beta 2 Fan Speed Controller Day And Night

The BETA-2 can control variable-speed fans by using the current temperature to increase or decrease the fan speed. By increasing the fan speed, cooling is increased… decreasing fan speed will reduce cooling capacity. Using the BETA-2 in this way provides a VERY economical and efficient way of dealing with heat within an enclosed space.

https://www.trolmaster.com/PDFHtml/BETA-2.html

Auto Fan speed control for Day And Night , good for most Fans

Although HIGH Level Efficiency Fans Like the Can Fan 355mm or Max 400mm  we would recommend the Proper Ruck or Can Fan Speed Controllers

https://glandorehydro.com/shop/ventilation/the-finest-fans-in-the-world/can-fan-satellite-new-revolutionary-4amp-fan-controller/

https://glandorehydro.com/shop/ventilation/the-finest-fans-in-the-world/can-fan-controller-3-5amp-transformer-tech-no-humm/