def METHOD_NAME(self):
    """
    Retrieves the fan airfow direction
    Returns:
        A string, either FAN_DIRECTION_INTAKE or FAN_DIRECTION_EXHAUST
        depending on fan direction
    Notes:
        In DellEMC platforms,
        - Forward/Exhaust : Air flows from Port side to Fan side.
        - Reverse/Intake  : Air flows from Fan side to Port side.
    """
    direction = [self.FAN_DIRECTION_EXHAUST, self.FAN_DIRECTION_INTAKE]
    fan_status = self.get_presence()
    if not fan_status:
        return None
    is_valid, fan_direction = self.fru.get_fru_data(self.fan_direction_offset)
    if is_valid and fan_direction[0] < len(direction):
        return direction[fan_direction[0]]
    else:
        return None