Empirical Study on Ventilation Strategies for Residential Buildings in Severely Cold Areas Based on Indoor Air Quality
Based on the indoor air quality of residential buildings and the ventilation habits of residents in severely cold areas,Liaoning was used as an example to provide scientific reference for indoor ventilation strategies adopted by local residents.In this study,online sensors were used for long-term online monitoring of residential air quality and ventilation behaviors and habits of residents.A statistical analysis was conducted to determine the current pollution status and ventilation strategies.In Liaoning,the average daily indoor PM2.5 concentration exceeds 50 μg/m3 more frequently in winter due to severe outdoor pollution;the average daily concentration of CO2 higher than 1000 ppm occurs mainly during the transitional season and winter;the formaldehyde concentration exceeds the standard more often in bedrooms than in living rooms.The behavioral habits of residents to open windows are highly seasonal and are influenced by temperature,with an average daily window-opening duration of only 0.3h in bedrooms in winter,and most residents have the habit of opening windows after getting up for ventilation.The influence of indoor temperature and the concentration of different pollutants should be taken into account in different seasons,and attention should be paid to cleaning before using mechanical ventilation systems and air conditioning systems to avoid secondary pollution.
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