Lebensmittel Luft
Without food survives the
human 40 - 60 days
Without water survives the
human 4 - 5 days
Without air survives the
humans 5 - 9 minutes

Air is life

The air we breathe has a significant influence on our health, performance and well-being. Since we spend about 90% of our time indoors, the quality of the indoor air and the quality of the ventilation and air conditioning systems are of particular importance. For a healthy indoor climate, CO2, pollutants, viruses and other germs must be removed. High indoor air quality also has a positive effect on the ability to concentrate and on productivity. At the same time, effective ventilation reduces a possible virus load in the room and thus the risk of transmission via virus-laden aerosols. In addition to low-pollutant air with a CO2 content of no more than 1,000 ppm, indoor humidity is important for our health. Experts recommend a minimum humidity of 40 %.

Components of the air

Optimal range of room humidity

In the range of 40 to 60% relative humidity, the load for the human body is lowest! This range is very unfavorable for germs, fungi and bacteria, which means that the air contains hardly any contamination for humans. The risk of contracting flu and cold viruses is minimal here.

Assessment of the risk of infection

Scientists at RWTH Aachen University have analyzed the risk of infection by aerosol-borne viruses in different rooms with varying occupancy - from lecture halls with 1,000 students to classrooms to larger parties at home. They critically evaluate the risk of infection with coronavirus by aerosols, especially in rooms with long occupancy periods, high occupancy densities, and without mechanical ventilation or ventilation guidelines - for example, in many classrooms - compared to other types of rooms. Private parties can also be much riskier than events in well-ventilated public buildings due to low air exchange.