1) Blank values for all studied parameters were measured in the test chambers.
2) Each product was unpacked and put into the test chamber without activating/lighting it. (For purely passive emitting products that started to give off odor immediately after unpacking, the procedure continued with step 5.)
3) The emissions of the product were measured.
4) The product was activated/lit in the chamber.
5) The emissions were measured for several hours to days (depending on the operation/burning duration, see below).
6) For some of the products the measurement was continued for several weeks.
S1eS6: The samples were tested in 3 m3-chambers according to ISO 16000-9. Each test was carried out with one product per chamber. All samples give off odor immediately after unpacking except the electric evaporator (S2; this product had to be activated by plugging it into a wall socket). During the tests chamber air was collected on sampling tubes filled with Tenax® TA after 0.5 h, 1 h