Dometic 3312020.000 Comfort Control Center II CCC2 Multi-Zone Kit MULTI-ZONE KIT - For Comfort Control Center II (CCC2). FITS ALL BRISK AIRS - Replaces the control board on Brisk Air Conditioners. Will work with the following Upper Unit Model Numbers: B57915, B59516, 459186, 459530, 541815, 541816, 551816, 640315, 641815, 641816, 641835, 651815, and 651816. THERMOSTAT RELAY CONTROL BOX - For use with 10-button CCC2 thermostat ONLY (thermostat sold separately)