Replacement Ceiling Assembly 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. - Model 8330-6331 (64955) is for use with all 8000 Series Coleman-Mach air conditioners with lateral duct and straight through duct systems. To determine which model Chillgrille you need, simply remove the existing plastic ceiling assembly inside your RV.