Some embodiments may provide a vehicle-based ventilation system for an accessory. The system may include a source of climate-controlled airflow, a duct, and an accessory climate sensor. The duct may include a source-end and an accessory-end. The source end may be configured to couple to the source of the climate-controlled airflow. The accessory-end may be configured to couple to an accessory. The accessory climate sensor may be positioned within the accessory.

Provided is a function extension board for automobile doors and windows including a board body. An upper edge and side edges of the board body are provided with board convex edges corresponding to grooves of an automobile door and window frame and an automobile door frame. A lower edge of the board body is provided with a board groove corresponding to an upper edge of an automobile window lifting glass. A ventilation opening is formed in the board body. The board body is detachably provided with a rain cover on an outer side of the ventilation opening.

A vehicle ventilation apparatus is attached to a panel member including a ventilation port. The vehicle ventilation apparatus includes a support member fixed around the ventilation port of the panel member and a flap supported by the support member in an angularly displaceable form. The flap is angularly displaced with respect to the support member, thus can change a posture between a close posture of closing the ventilation port and an open posture of opening the ventilation port. The support member includes a first support part rotatably supporting a first part of the flap, a second support part rotatably supporting a second part of the flap, and a protrusion part protruding to one side along a passage direction of the ventilation port.