In most outdoor environments, ingress protection from moisture or dust can be critical. Depending on the severity of the conditions, there are three different levels of protection that can be considered. For devices in high humidity or light water environments, conformal coating can be added onto the internal electronic components to prevent rust. This addiction can be applied to any Sanyo Denki fan without any impact to the fan performance. For devices with some direct water spray or heavy dust exposure, a fan with extra ingress protection may be required. IP55 rated fans are the middle ground options for these environments. These fans utilize internal conformal coating and a labyrinth seal to prevent any ingress. For devices used in harsh external environments with frequent water exposure or potential submersion, an IP68 rated fan will be required. The IP68 rated fans will have all internal components fully potted with an epoxy coating to prevent any ingress.