The KA2O technology from Kampmann is an innovation with high quality and functionality, which also values ecological aspects. The technology is an evolution of the indirect evaporative cooling, as it is used in building ventilation systems. During winter, the system is used for heat recovery, in summer for indirect evaporative cooling. For this technology, Kampmann uses only high-quality materials, e.g. coated aluminium or stainless steel for the aquiferous parts. The system is built modular so that it can be flexibly used for different applications. The result of the technology: a remarkably higher efficiency, combined with less need for energy and lower costs for the owner as well as less CO2 emission.