Systemair Revolution Vector Silenced EC Fan V2Overview The SystemAir Revolution Vector Silenced EC Fan V2 was designed to generate huge pressure levels, to use less energy and to offer increased control. The unit is built to ensure high levels of efficiency and effectiveness. With no humming or vibration, even at low speeds, the product is almost indestructible. The motor doesn't overheat, and the body comprises a strong composite material. Each unit utilises EC technology ensuring a powerful and