For best performance, do not setup Eureka Auto Dry Box at places where it would be exposed to direct sunlight or close to heat sources. Provide sufficient space between the rear of the box and the wall to allow proper venting. Avoid dusty items to prevent the valve doors from being blocked by tiny objects. Also, when storing items, please do not place items too closely to the core unit. Otherwise, the core unit will not function properly and the humidity level will not be reduced.