The Type 4/4X filter fan shroud protects filter fan and exhaust grill from standard washdown procedures. It meets Type 4/4X standards when used with HF or TFP Type 12 Filter Fans and Grills. Easy one person installation with simple back panel mounting; hardware included. HOFFMAN Type 4/4X shrouds are for general ventilating use only and are not suitable in all applications or environments. Spraying water directly up the bottom of the shroud will incur water ingress.