The mechanism is CO₂ accumulation. In an inadequately ventilated enclosed space (including poorly ventilated open-plan offices), CO₂ rises during occupancy. At approximately 1,000 ppm — reached within 30–45 minutes in many enclosed spaces — measurable declines in decision-making quality, response time, and sustained attention are documented. HIGHKA’s dual-channel turbine ventilation runs continuously throughout occupancy, maintaining airflow that prevents CO₂ from accumulating to performance-degrading concentrations. The result is that cognitive clarity is maintained across the duration of an extended focus session, rather than declining as the session progresses — directly addressing the afternoon energy decline that many employees attribute to general fatigue rather than its actual source: air quality.