The ventilation system is set to transfer more than 73,000m³ of air through the building every hour so. Consequently, it was decided to install a highly efficient heat recovery system. Danfoss Drives has opted for a highly efficient recovery system which reuses 90% of the energy stored in the exhaust air. Meanwhile, the system cools the building by spraying vaporised water into the injection air. On the vaporisation of the water, heat is extracted from the air and the temperature is lowered with the least possible consumption of energy. This kind of cooling only uses 12-16% of the energy of traditional compressor cooling.