Labels:field house | flag | purdah | sky OCR: Visible Mullions Hidden Mullions When continuous line look 1S desired hidden mullion design preferred Hidden mullions usually recessed well behind the louver face SO as to be inconspicuous or invisible to the casual observer They are generally utilized in architectural" applic cations However due to their design. fully recessed mullion designs do not provide downspouts adequately relieve drainable blades Drainable blade louvers require partially recessed or visible mullions for proper ope ration rinvisible applications aina reguire part ially mullig oper ation
