According to a 2021 study, using vaping products inside the house may cause secondhand exposure to harmful vape aerosols.
The researchers found that using e-cigarettes indoors increases air pollution in the home.
E-cigarettes increase particulate matter in the rooms in which people smoke them. The particulate matter the researchers found was very fine, with a diameter of less than 2.5 micrometers.
"Particulate matter" is the term for fine particles of solids and liquids in the air, which people can inhale.
Inhaling particulate matter may cause health problems. Particles less than 2.5 micrometers in diameter may cause the biggest health risks.