Ice Qube's FPW family is the industry's only patented NEMA 4X Plus+ flush filter fan system. Traditionally, NEMA 4X flush fan systems do not prevent hoses from spraying directly into the intake and exhaust ports of the fan system. The FPW series was designed by our engineers to eliminate the threat of water damage to enclosed electronics, even in work areas that require direct hoses and/or high pressure hoses to flush. Ice Qube's high CFM blower draws filtered ambient air into the housing to cool enclosed electronics.