def METHOD_NAME(self):
    """
    Retrieves the direction of fan
    Returns:
        A string, either FAN_DIRECTION_INTAKE or FAN_DIRECTION_EXHAUST
        depending on fan direction
    """
    direction = self.FAN_DIRECTION_EXHAUST
    fan_direction_file = (FAN_PATH +
                          self.fan_direction.format(self.fan_tray_index+1))
    raw = self.__read_txt_file(fan_direction_file).strip('\r\n')
    direction = self.FAN_DIRECTION_INTAKE if str(
        raw).upper() == "1" else self.FAN_DIRECTION_EXHAUST
    return direction