I'd say it totally varies.

My smoke alarm at home will go off after a steamy shower.
We smoked hookah in the room and my dorm smoke detector didn't go off. (Extremely stupid idea, looking back though)

Use this trick: tape a bag over the smoke detector

If you make it airtight you could even hotbox that shit. Except your RA would probably be able to smell it from the other side of the building.
THClord Reviewed by THClord on . How sensitive are smoke detectors? Now that im in college, i have to worry about smoking around smoke detectors. I just now smoked in the bathroom with the shower running hot water, and i taped a bag around what could be a smoke detector in the bathroom. There are also two smoke detectors in the hall outside the bathroom that i didnt tape up, but i put a towel underneath the door so that no smoke could get outside the door. So what im asking is, is this a safe spot? Exactly how sensitive is a smoke detector and how much smoke Rating: 5