Table 1.

Smoking protocols for smoking machine

FTC*MDPH (271)HC
Puff volume (mL)354555
Puff duration (s)222
Mean flow rate (mL/s)17.522.527.5
Interpuff interval (s)603030
Ventilation holes (where applicable)100%50%0 (all holes blocked)
Air flow (mm/s)Not specifiedNot specified200 ± 50
Butt length23 mm for nonfiltered cigarettes or the length of the filter overwrap plus 3 mm for filtered cigarettes23 mm for nonfiltered cigarettes or the length of the filter overwrap plus 3 mm for filtered cigarettes23 mm for nonfiltered cigarettes or the length of the filter overwrap plus 3 mm for filtered cigarettes