Effect of recirculation air cleaners on indoor air quality in a children's home.

The subject of this study was to assess the efficacy of the air cleaners provided by the Czech Power Company CEZ, J.S.C.

Electro-ionic microclimate and materials used in the indoor environment.

In 170 experiments relationships between 31 different materials used in indoor premises and ionization of the air in their proximity were assessed. The influence of temperature and relative humidity on ionization of air was studied. It was observed that the materials tested could be divided into four groups according to their behaviour towards ambient light negative ions.