Indoor climate and energy consumption in residential buildings

The investigation shows that in apartment buildings with natural ventilation the indoor air quality (IAQ) changes greatly. In the investigated apartment building the relative humidity level in bedrooms of different apartments varied greatly, from 35 to 72%. High relative humidity is accompanied by problems of mould. Greatly varying was also the morning CO(2) level in bedrooms of different apartments, from 1000 ppm to 4200 ppm, which is quite critical. Higher levels of CO(2) concentrations were first of all in bedrooms with renovated windows. By simulation the smallest is the energy consumption in the case of supply-exhaust ventilation. The results of the simulation of indoor climate are close to the results of the measurements. The indoor climate of residential buildings is greatly affected by the arrangement of air change which in its turn is influenced by the external climate of the country.