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Why does constant air exchange convey cosy comfort?

Stale, moist and polluted air provokes weariness and headaches. Excessive carbon dioxide content robs the human system of energy, disturbs the relaxation phase and has a negative impact on our sleep. An average German spends eight hours a night in bed. The CO2 amount in a bedroom occupied by two people exceeds the limit value stipulated by the Federal Ministry of Health already after approx. two hours. profi-air heat recovery ventilation is there to ensure a constantly healthy and relaxing living climate 24 hours a day. Filtered air adjusted to a pleasant temperature creates a comfortable climate in all rooms.