Open the specially designed louvers to channel cool air straight down into the cabin Exclusive EZReach Filter System provides quick access to the washable air filter. Simply loosen the Works with Thermostats: Non-Digital: 7330G3351. Digital: 8330-3362. Close the louvers to divert cool air through your existing duct system The Coleman Mach ChillGrille Assembly is a cool-only ceiling assembly for your RV's lateral ducted air conditioner system. Replaces 8330-C633 and 8430-633.