Examinations about the air humidity in lived dwellings depending on different air ventilation systems using a new characteristic value.

This work deals with problems of the air humidity in inhabited dwellings. A new approach is presented here which renders the definite diagnosis of humidity problems possible. The room air humidity from two buildings with different air ventilation systems with eight dwellings each is examined, The efficiency of the different ventilation systems is presented applying the new value, the so called "standardized room air humidity". The results can be summarized as follows: 1.) The mechanical permanently balanced ventilation has essential advantages over the natural exhaust air ventilation in buildings. 2.) Dwellings with permanently balanced ventilation show distinct advantages concerning air humidity. The values of absolute air humidity are lower in these dwellings than in dwellings with natural exhaust air. 3 , ) By applying the "standardized room air humidity" the problem of humidity can be shown quantitatively. It could be proved that the standardized value expresses the real situation. 4.) In dwellings with permanently balanced ventilation there is no danger of humidity problems, The average natural exhaust air in dwellings reaches dangerous limits, some of them exceed the limit considerably. 5 . ) A definite correlation between outdoor temperature and the standardized room air humidity has been proved.