A new study presented on 20th of April 2016 in at the 4th Workplace and Indoor Aerosols conference in Barcelona shows, for the first time, that exhaled e-cigarette particles are liquid droplets that evaporate within seconds.  

The study is a necessary one because it starts to address an issue that has be the cause of some confusion. That is, establishments not knowing whether or not vaping should be allowed indoors. The question has restaurant servers unsure of whether to confront vaping diners or leave them to vape in peace.

During the conference, Professor Dainius Martuzevicius, Vice Dean for Research at the Faculty of Chemical Technology, Kaunas University of Technology and leading expert on indoor air quality, said: "There is little data available on the properties of exhaled e-cigarette 'particles' in the scientific literature and as a result there is a growing discussion amongst the public health community as to whether the 'particles' exhaled following use of vaping products have potential implications for indoor air quality."

Tobacco cigarettes affect the air quality when smoked in an enclosed space because the smoke particles remain in the air, building up over time instead of dissipating. This paper is the first of its kind with compelling evidence that e-cigarette particles evaporate seconds after being exhaled. A non-vaper in the same room only risks being being exposed to the aerosol particles of a closed-circuit e-cigarette for a few seconds after the person vaping exhales them. It's also the first to show the effects of vaping in a realistic situation, the research showing clearly that there is no affect to the air quality when vaping was contained indoors.

The research was spearheaded by Fontem Ventures, which owns two e-cigarette brands but the study was carried out by the independent  Kaunas University of Technology in LithuaniaEMPA Swiss Federal Laboratories for Materials Science and Technology, and ETH Zurich the Swiss Federal Institute of Technology,  

This also tells us how fundamentally different exhaled e-cigarette particles are compared to those emitted by smoking conventional cigarettes, the latter of which are reported to linger in the air for long periods of time. By contrast, no accumulation of particles was registered in the room following e-cigarette use,” said Dr. Grant O’Connell, Vice President of Corporate and Regulatory Affairs, Fontem Ventures.