The Helios FR 22/30 is a speed reversing switch specifically designed for use with Helios GX 225 and GX 300 fans. Suitable for both surface-mounted and flush-mounted installation in dry indoor environments, this control unit features three slide switches. These allow for two-pole on/off operation with an indicator light, selection between high and low speed settings, and direction reversal for supply or extract ventilation. The FR 22/30 provides reliable and convenient manual control over fan operation, making it ideal for ventilation setups requiring flexible air movement options.