Dynamic of Changes in Carbon Dioxide Concentration in Bedrooms

Abstract The paper presents results of preliminary studies on indoor air quality in polish sleeping rooms. Objects in typical blocks of flats with low ventilation rates were taken into consideration. Carbon dioxide concentrations were used as an indicator of indoor air quality. Theoretical calculations, results of CFD simulations and results of conducted measurements were presented. Detected high levels of CO2 concentrations (above 3000 ppm) indicated improper ventilation and poor air quality in tested bedrooms. Airtight windows associated with modern energy-efficient construction trends were recognized as the reason of this situation. Authors of publication recommended using proper window air vents in case of buildings without mechanical ventilation. Using demand-controlled ventilation and sensory information in objects with mechanical ventilation was also suggested.