Designed for use with Coleman-Mach rooftop air conditioners with ducted distribution systems. Exclusive DirectFlow 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. Slender profile provides plenty of overhead clearance. Wall thermostat and optional heat kit sold separately. | Coleman Mach Coleman-Mach ChillGrille for Air Conditioner, Heat Ready, Lateral Ducts, White