How to Tell if Someone is Vaping in Your House: Hidden Signs Can You Smell Vape Smoke In A Room Does Weed Smell When You Vape It? Thirdhand Smoke Resource Center Protecting Californians In secondhand vape, scientists smell risk American Heart Association How Long Can You Smell Vape Smoke On Someone I can do it at home, the smell won't linger': Do youths who vape know what they're inhaling?