The RAC143 models are the newest addition to our successful LX Series split system air conditioner lineup. Optimized for the new 14.3 SEER2 Regional Minimum Efficiency in the Southeast and Southwest US, these outdoor units are specifically designed to be matched with Guardian indoor coils, furnaces, and air handlers to provide a complete system solution. The high efficiency microchannel aluminum coil is manufactured using an improved material system providing reliable performance and small unit size. Coils are protected from mechanical damage by a proven stamped steel coil guard design. Compressors are protected internally by a high pressure relief valve and a thermal protector, and externally by the system high pressure switch. Diagonal base valves with open access for low-loss fittings, single panel access to the electrical controls, swing out control box for full corner access, and removable fan guard allow easy access for unit maintenance.