CHILLGRILLE - Exclusive Direct-Flow Louver System provides cool air where you need it for personalized comfort in any RV! • OPEN the specially designed louvers to channel cool air straight down into the cabin. • CLOSE the louvers to divert cool air through your existing duct system. • Exclusive EZReach Filter System provides quick access to the washable air filter. Simply loosen the fastener and swing out the grille to remove the filter. • Easy installation with fully illustrated instructions. • Slender profile provides plenty of overhead clearance. Chillgrille without Control, for Ducted Straight-Thru Systems.