Particulate matter (PM) 2.5 levels in ETS emissions of a Marlboro Red cigarette in comparison to the 3R4F reference cigarette under open- and closed-door condition

Table 1 Climate parameters

	Relative Humidity		Temperature		Atmospheric Pressure	Wind velocity
	[%]		[°C]		[cmH₂O]	[cm/s]
	Mean ± SD		Mean ± SD		Mean ± SD	Mean ± SD
	indoor	outdoor	indoor	outdoor	indoor	indoor
open-door measurement
3R4F	67 ± 11	82 ± 12	12 ± 2	12 ± 1	1.007 ± 7	5,6 ± 7,9
Marlboro Red	57 ± 6	71 ± 7	12 ± 1	11 ± 1	1.012 ± 1	0,75 ± 1,5
closed-door measurement
3R4F	67 ± 9	80 ± 13	13 ± 3	12 ± 2	1.007 ± 7	< 0,001
Marlboro Red	58 ± 6	70 ± 7	12 ± 1	11 ± 1	1.013 ± 1	< 0,001

Absolute values for climate parameters (mean and standard deviation) are recorded during the ETS measurements of 3R4F reference and Marlboro Red cigarettes under open-door and closed-door conditions.