Can e-cigarettes / vaping set off smoke detectors?

There's no firm rule for using vape pens around smoke detectors. Some detectors may be triggered, some may not. The best thing to do is judge each circumstance on its own merits. If you produce a lot of vapour and you're in very close vicinity to a smoke detector in a crowded or sensitive area, it's best to not vape.

1. Will my vape set off a smoke alarm?
2. How can I vape without setting off smoke alarm?
3. Will a Juul trigger a smoke alarm?
4. Can I vape in a hotel room?

Will my vape set off a smoke alarm?

What About E-Cigarettes and Vaporizers? Unlike conventional cigarettes, these battery-powered versions create vapor as a byproduct, not smoke. Despite this, they can still set off a fire alarm if you blow vapor directly into it. All smoke alarms are sensitive to small, airborne particles.

How can I vape without setting off smoke alarm?

You would have to keep the vapers away from the detectors. The smoke detectors don't know it's not smoke, they are set off by the particles. They don't know if it's smoke, dust or steam so the only way to keep it from going into alarm is to keep the vape away.

Will a Juul trigger a smoke alarm?

The Vape from a juul or from a vape box shouldn't set off the smoke detector unless you're using competition juice in it which is specifically designed to blow a huge cloud of vapor and then the smoke detector might see it and go off.

Can I vape in a hotel room?

Hotel policies on vaping vary from place to place, but most of them consider it to be the same thing as smoking, and in this day and age will even have “vape free zone” signs posted.