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Cool heads think more clearly

High temperatures reduce people’s performance, burden their circulatory system and reduce their ability to concentrate. Cool heads work, plan and think more successfully. Good climate can do even more: Uniform air conditioning through room air-conditioners increases the lifetime and shelf life of climate-sensitive objects, systems, goods, and foodstuffs.

Air as an essential resource
The main living area for man is indoors. This implies that healthy room air should be constantly available in a sufficient amount. Therefore, air in general is by far the most vital resource that man needs daily in an amount of about 15 to 30 kg. For comparison, he only consumes about 2 to 3 kg of water and about 1 kg of foodstuffs. These figures show that at least the same quality requirements should be set for the air purity as those that are taken for granted in the treatment of water and the production of foodstuffs. In addition, when digesting fluids and foodstuffs, our digestive organs appear to have better defence mechanisms against pollutants than the human respiratory system. Unhealthy air constituents can penetrate largely unhindered through the bronchi in the alveolar region of the lungs. Not only does the oxygen exchange with the blood take place in this area. This is also the way for harmful substances to penetrate into the human organism.


Operating principle of an air-conditioning system
The air-conditioning system maintains room temperature and room air humidity at a pre-set level. In the system, the outside air is cleaned by means of filters, heated or cooled with heat exchangers, humidified or dehumidified, and blown into the rooms via ventilation ducts. The system is equipped with precise measuring and control devices to ensure its operation at different outside temperatures and internal loads (heat, moisture, etc.). The exhaust air from the rooms is blown out into the open air or, in some cases, is mixed with the room air again. In modern systems, the waste heat is used without adding the used room air to the supply air.

Main uses of air-conditioning systems in the commercial sector:
-in sales areas that are exposed to high thermal loads, for instance, due to many visitors and spotlights for product display
-in offices, which can be heated by solar irradiation due to large window surfaces or flat roofs.
-in computer rooms, where relatively constant temperatures must prevail.

Also, private households tend to increasingly use the comfort of cooling and dehumidifying the room air by air-conditioning systems. Basically, the following is true: People need a balanced climate to feel good. If you feel comfortable, you can assume that everything is fine in terms of climate. However, well-being and cosiness are biased criteria, since the climatic conditions in which a person feels comfortable depend on a variety of factors, such as sex, age, clothing or physical and mental condition, as well as the respective level of activity. How do we determine ideal climate? Science has helped us to do it. Numerous scientific studies have distilled out a comfort area. The comfort diagram below shows approximate values that normally constitute a favourable climate.

Did you know? 
Even at a comfortable air temperature, cold walls are unpleasant, since the body is deprived of excess heat by radiation. Therefore, walls with a good climate design should not be more than 2°C colder than the room air. The intensity of radiation can be reduced by the use of thermal insulation or special paints.