The pollutant concentration increases especially in manufacturing processes. Even though every human body has its own filters such as the cilia in the trachea and bronchi, or the lungs, they can only digest organic particles. Industries mostly process metal, which is inorganic and therefore harmful to employees when inhaling its dust. Due to their tiny particle sizes of only a few micrometers, they are mostly invisible to the human eye. This leads to underestimating the danger of metal dust and similar inorganic emissions. The chances of getting severe diseases such as lung cancer and allergies are highly increasing. Only an extraction system is able to filter these particles and prevent employees from breathing in contaminated air.
An air conditioner only whirls up the particles in the air, much like a kitchen blender. Ventilation leads to an exchange between the indoor and outdoor air. In large cities, however, the pollutant values are close to the permissible limit values of 50 micrograms per cubic meter. The outside air is heavily loaded and brings even more pollutants into the room when aerating. A filter and extraction system sucks in the polluted air, which results in particles sticking to the integrated filters. After the filtration, only the cleaned air gets back into the room.
Invest in the future
In the long term, employees are more productive and effective, as they are less susceptible to diseases caused by dusts in manufacturing processes. For many employers, health and safety do not seem to be as profitable as a new manufacturing machine, but in the long term, they are extremely valuable. Only healthy and satisfied employees are motivated, committed and capable. The best machines and equipment require expert knowledge by persons who operate them. A machine can neither gain experience, nor can think independently and solve problems.
As a resource-poor country, it is even more important to Germany building on the inventiveness and creativity of its people. Within a few years, there will be more employees older than 50 years and fewer under 30 years, due to demographic change. If people are supposed to work well into old age, the country and each company must take care to ensure that the older people, even above the age of 60, are still able and motivated to work effectively. Human capital is an essential part in increasing sales and profits.
According to a 2006 study of the Federal Institute for Occupational Safety and Health, the third most common disease is related to respiration. As a result, annual production losses of 5.5 billion Euro are incurred. Small particles settle in the lungs and make breathing difficult. Most people often regard air as common property; but the quality is respected too rarely. In 2005, a non-productive time lasting for only one day caused about 90 Euro lost in production costs in medium-sized businesses. Preventing illnesses reduce downtime costs. When employees feel valued and comfortable, they are happier and work more effectively. 
 Source: (German Federal Institute for Occupational Safety and Health, 2007)