HIGH SPEED EC MOTOR

We have been selling these fans for 3 years and never had we had one come back. 

200mm

This fan incorporates a digital, EC (Electronically Com-mutated) DC motor that provides superior performance and efficiency beyond what is possible with traditional AC motors. The High Speed type uses a 3-phase design that pushes the boundaries of performance for a fan of this class.

3-MODE ENVIRONMENTAL CONTROLLER can be added for $60.00 (Out of Stock)

The addition of an environmental controller (sold separately) will allow these fans to be speed and temperature controlled:
https://www.homegrownkiwi.com/products/mountain-air-mountain-air-environmental-daisy-chain-controller/