Many of building products emit volatile organic compounds (VOCs) therefore reducing the indoor air quality. The emitted amount and pollution type depends on each specific source. This paper analyses the VOC concentration change caused by such sources as sprayable window cleaner, aroma candles, sprayable air refresher, waterborne acryl-based paint, solvent based paint and acrylic based hermetic sealant. The tests are done at both closed and ventilated climatic chamber conditions. The results show that three different types of VOC concentration change dynamics can be separated depending on the pollution source. If the room is ventilated according to the local regulations the threshold level which indicates hazardous environment for persons is exceeded for 12 hours after applying the pain at given conditions. The obtained data can be used for future studies and to develop high precision methods of VOC concertation prediction and serve as an information source for future ventilation standard development.