Evaporative air cooling systems for reduced energy and water consumption; Modular air handling units for use inside modular data centers for cooling computer equipment; cooling distribution units for distributing refrigerant to devices that generate heat; cooling distribution systems comprised of temperature sensors, condensers, compressors, heat exchangers, piping, valves, expansion tanks, flow meters, pressure gauges and sensors; Cooling systems for server racks consisting of electric fans, heat exchangers and piping within an enclosure and a subassembly; fan assembly system for data centers; Air-conditioning apparatus and installations; Custom manufacture, repair and maintenance of cooling systems for modular data centers; custom manufacture, repair and maintenance of cooling systems for buildings; Research and development and consultation related thereto in the field of cooling systems for modular data centers; research and development and consultation related thereto in the field of cooling systems for buildings