Investigation of internal air parameters in a residential building when improving the exhaust ventilation system

Objective . Air quality in buildings is determined by various factors, including: decisions on air exchange and ventilation systems. The level of relative humidity, indoor air temperature and concentration of other pollutants play a key role in creating a comfortable living environment. The purpose of the study is to develop recommendations for the design of exhaust ventilation in residential buildings. Method . Natural studies of the regularity of changes in heat and humidity parameters of air in the kitchen-living room in the case of natural and forced exhaust ventilation in the design points, as well as the time of restoration of thermal balance in the room (or the flat as a whole). Result . It was found that the air temperature varied in the range of 23.1-24.6 ° C, relative humidity – in the range of 38.7-50.3 %, which corresponds to an acceptable range, but not optimal. The use of a hood over the cooker gives a steady decrease in temperature in all points by 1-1,5 °С, and relative humidity in the working zone at the cooker – by 10-20 %, in the upper zone and at the hood – up to 30 %. Exit to the temperature plateau of values before the experiment with the use of an extraction umbrella over the cooker occurred 30 minutes faster than with natural ventilation. Conclusion. An improved ventilation system is required to ensure optimum indoor climate conditions. The correct design of the extraction system above the cooker with an umbrella and an integrated fan helps to prevent condensation on surfaces and improves the climate characteristics of the area served.