The Furrion Chill RV AC Standard Air Distribution Box (ADB) design allows for maximum cooling with direct downward cool airflow to cool down the RV fast. It has a shutter, and it can be turned off to maximize your duct work airflow. Smart DesignThis design has been engineered for use in non-ducted and ducted systems, and installation couldn't be simpler. The detachable filter makes cleaning quick and easy. This ADB is ultra-thin for a streamlined, modern look that does not interfere with ceiling space. Engineered to Fit a Variety of RV TypesThe Furrion Air Distribution Box with manual control works with the Furrion Chill AC to provide a premium cooling experience for any RV or travel trailer with a roof thickness of 3"-6" and roof opening of 14".PLEASE NOTE â Air conditioning equipment designed for R410A refrigerant may be replaced with components designed for R32 refrigerant. Air conditioning equipment designed for R410A refrigerant CANNOT be used in R32-designed systems. The R32 refrigerant CANNOT be used in R410A-based air conditioners. Refer to your air conditioner equipment to determine the type of refrigerant used.• Single direction downward airflow• Cool air is distributed quickly and quietly throughout the cabin• Manual controls for simple operation• Ultra-thin streamlined design• For 3"-6" thick roofs with a 14" opening• Detachable filters are easy to clean and help keep your cabin air fresh• Low-profile design allows more head space and less obtrusion• Multiple fan speeds for ultimate comfort• Two-way airflow for circulation• Compatible with ducted and non-ducted systems• Measures 17.25"W x 17.25"H x 2.4"D• Furrion reference number: FACT11CA2-PS-AM Detachable filter makes cleaning quick & easy Ultra-thin for a streamlined, modern look that doesn't interfere with ceiling space Fits a roof thickness of 3"" to 6"" & a 14"" roof opening | Furrion Chill RV AC Standard Air Distribution Box for Manual Control, R32