Indoor air pollution and it influencing factors in newly decorated place of Beiing City
[Objective]To investigate the pollution situation of formaldehyde and TVOC of indoor air in newly decorated house of Beijing City,to find out the similarity influencing factor,and provide evidence for control of indoor air pollution.[Methods]The determination on formaldehyde and TVOC concentration of indoor air in 207 sets of newly decorated house in Beijing City by sensor method was to find the similarity factor affecting the indoor air quality.[Results] The release of harmful substance increased with the raise of temperature.The excessive rates of formaldehyde and TVOC in spring and autumn were 39.0% and 74.9%,both 100% in summer and 14.5 and 42.9%%in winter.The concentration of formaldehyde and TVOC in meeting room was highest among all the types of house,excessive rates were both 100%,followed by 42.9% and 28.6% in business place,and 38.3% and 79.2% in ordinary residential house.The concentration of formaldehyde and TVOC in breezy house was obvious lower than ventilative house with bosseyed structure under the same exoteric condition.The concentration of harmful substance in southern house was obvious higher than northern house.[Conclusion]Temperature,type of house,layout and building direction are the main influencing factors to the indoor air quality.It is necessary to take effective measures to reduce pollution levels based on the pollution characteristics.