The Coleman ChillGrille™ is a cool-only ceiling assembly for your RV’s lateral ducted air conditioner system. •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.•Installation is fast and easy with detailed, illustrated instructions.•Slender profile provides plenty of overhead clearance.• Recommended Thermostat: Non Digital: 7330G3351, Digital: 8330-3362.