Not required., Reach-in and walk-in enclosure for outdoor installation., Statutory enclosure safety equipment., Noise attenuation of compressors., External switchboard with circuit breaker and field for power meter., Upgrade of corrosion class on evaporators to C5., Upgrade of evaporators to maximal corrosion protection., Additional PLC integration., Customized racks., Ejector technology for optimization of capacity and COP.