If someone vapes indoors, does an air purifier actually help? Vape smoke is technically an aerosol, made up of tiny droplets containing ingredients like propylene glycol, vegetable glycerin, nicotine, and flavouring agents. Most people know smoking indoors is a no go, but did you know that vaping indoors isn't allowed in North Dakota either? Thank you for helping keep shared spaces comfortable for everyone! Vaping Indoors: How Vaping Affects Indoor Air Quality Can You Vape Indoors? Rules, Smells & Other Options FRE.