[Indoor climate as a cause of health complaints. A review].

Energy conservation, insufficient ventilation and introduction of new building materials are accompanied by increasingly frequent complaints of increasingly frequent mucosal irritation, headache and lethargy among occupants, commonly called "sick building syndrome". Infections and toxic allergic reactions may be caused by infected humidifiers. The article includes a review of symptoms and causes. Many of the complaints can be prevented. Combined efforts by medical and technical personnel are necessary in diagnosing and solving indoor climatic problems.