To provide easy grasping of an installed location and a tenure of use of an apparatus to a manufacturer for maintaining performance of the apparatus in long term usage, since in an electric type bathroom ventilation dryer, the manufacturer is obligated to carry out inspection after passage of use of a period determined by the manufacturer.
In the information display system, a QR code 5 is displayed in an operation part 6A of the bathroom ventilation dryer provided in a wall surface outside a bathroom to operate the bathroom ventilation dryer, and by using a mobile telephone 4A having a QR code reading function, registration of a name, a manufacture date, and use of the apparatus to the manufacturer can be carried out by the mobile telephone 4A, user information can be managed by the manufacturer, and guidance for promoting inspection can be transmitted to the mobile telephone 4A after passage of the period determined by the manufacturer.
Hiroki Naito
Daisuke Nagano