Can Vape Set Off A Smoke Alarm Vape Sets Off Fire Alarm: How Do Vape Detectors Work? Mouth to Lung (MTL) Vs Direct Lung (DL) Inhale Explained E Cigarette Direct Smoking and vaping are often compared, but neither is harmless. While they work differently, both can expose the lungs to addictive nicotine and harmful chemicals that impact breathing and overall health. Smoking Eli5: how come vape smoke don't set off smoke alarms detectors? : r explainlikeimfive