The SyCool Split system consists of scalable indoor heat absorption CRAHs and outdoor-mounted heat rejection condensers that can be incrementally deployed as whitespace is consumed. Refrigerant gas moves from the CRAH and refrigerant liquid moves from the condenser through piping for continuous and efficient heat removal. Refrigerant phase change is accomplished passively for economizer cooling or actively for traditional DX cooling. During economizer cooling operation, SyCool achieves 75% heat transfer approach to ambient temperature, and, as compressors are activated, it continues to capture economizer cooling until it is no longer available. CRAH units arranged on both sides of the white space can deliver over 56 kW per lineal foot of wall.