Abstract: Provided herein is a photocatalytic device that is easy to maintain. A photocatalytic device is provided that includes a cabinet, a photocatalytic unit disposed inside the cabinet and including a photocatalyst, a light configured to provide light to the photocatalyst, and a fan configured to send airflow to a surface of the photocatalyst. The photocatalytic unit is configured to be detachable from the cabinet.
Abstract: A wall attachment system is provided that includes an object to be mounted, and an attachment unit for attaching the object to be mounted to a wall surface. The object to be mounted has a back surface installed with a metal. The attachment unit has a front surface installed with a magnet. The wall attachment system is configured so that the metal and the magnet contact each other in response to the object to be mounted being set in position for installation on the attachment unit.