Do Vapes Set Off Smoke Alarms? What You Should Know Can Hotels Tell If You Vape? (4 Ways) Best Way To Smoke In A Hotel Room Discreetly HEMPER How Do Smoke Detectors Detect Vape The only smoking and noise detector for rental properties Your guests aren't the only ones checking in. So are their vape pens. With over 13 million regular vapers in the U.S. alone, unauthorized vaping is a major operational risk for hotels.