Impact of Ventilation Performance on Human Behaviour: A Case Study After Apartment Building Thermo-Modernization

Increasing requirements for reducing energy consumption result in thermo-modernisation existing buildings. Modernized buildings have significantly lower transmittation coefficient; infiltration air rate slows down markedly, which may lower indoor air quality (IAQ) noticeable; one gauge with a vane probe measures the air velocity and temperature at a grille in the toilet; second gauge with IAQ probe located in a room measures the mole fraction of carbon dioxide, dry-bulb and wet-bulb temperatures, absolute pressure, and humidity; moreover there are estimated the measurements uncertainties of: the volume flow rate, mole fraction of CO2, temperatures, and humidity. IAQ in a dwelling after thermo-modernization is evaluated in a sixty-year old building; heating system ensures thermal comfort during heating season; ventilation performs poorly, for vapor condenses on the window; carbon dioxide concentration is too high, which curbs mental activity greatly.