RT Journal Article SR Electronic A1 Svoboda, Jaroslav T1 Ions and their contribution for living space JF Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis YR 2014 VO 56 IS 2 SP 189 OP 198 DO 10.11118/actaun200856020189 UL https://acta.mendelu.cz/artkey/acu-200802-0024.php AB This contribution is dealing with more than up to date topic. Nowadays more than one third of human population suffers from some form of allergies - dust, pollen or mites. The air we breathe the whole day does not come from outside, on the contrary it comes from closed rooms used for living. the important part of air are the negative ions which are neccessary for life. Therefore, the optimal level of ions should be maintained. Living enviroment which does not contain enough negative ions causes various diseases, such as allergies, asthma, headache, tiredness and depressions.Increased concentration of negative ions inside a house is the basic prevention of tiredness and other diseases.