Beautiful slim design compatible with both ducted and non-ducted air conditioner systems. Compatible with single/multi-zone Furrion wall thermostat and detachable filters for easy cleaning. Air Distribution Box designed for 3" to 6" roof thickness and 14" roof opening; Furrion Chill™ Ceiling Assembly for use with ducted/non-ducted RVs. Size: 19-11/16"L x 19-11/16"W x 1-1/2"D. Includes mounting hardware. Color: White. Wall thermostat/controller sold separately. 2021123781.