and they'll be forever sounding due to the smoke from all the pot smoking.
when I was in student halls of residence the fire alarm system was based around smoke detector heads (ionisation) in every corridor and hallway, at the top of each level of stairs and in all the tv and common rooms, there were sensors inside the rooms at the entry to each floor on the stairs, there were 2 rooms at each floor right next to the stairs separated from the rest of the floor by a swing door at either side, these were set aside as non- smoking rooms for non smoking students only.....there were smoke detector heads in each tv and common room, and heat detector heads in all of the student kitchens on each floor, the rest of the rooms were ok for smoking in at the time and had sounders only with no smoke detectors, which was years ago now, and you used to smell "special smoke" coming from the rooms when you walked past the closed doors lol ....I didn't smoke myself (still don't) but wasn't bothered if others did, used to get visitors from other rooms and other halls of residence visiting that smoked....
There used to be a terrible problem with people coming back in drunk at 3Am and breaking the call points, it got to the stage that it was happening several times every week and sometimes 2 or 3 times a night so 330+ people were stood on the street outside, fire extinguishers thrown out of windows onto the street, or sprayed all over the place......hose reels wheeled out down the lightwells and turned on....etc etc... that was my experience
The rules and regulations have changed now, students are not allowed to smoke inside any rooms in the halls of residence these days (I don't know if that counts for houses and flats split up for renting to students as well or just the large dedicated non-private student halls of residence) also as far as I know, the Universities would not get away with having large numbers of rooms without smoke alarm heads in them these days (i.e just sounder heads) I think each and every room in the whole building must have a smoke detector fitted.....
The only problem that you will find is that the students will come back in drunk in the early AM and bring people with them to drink, somebody will forget about the fire alarm and light up a cigarette.....
Covering with a carrier bag is an old trick.....sometimes people who have had a few drinks will try to pull the alarm head off of its base thinking that this will stop it from picking up smoke, but this just sets the alarm off anyway as the alarm panel gets a fault...
I have been in a hotel once when the alarm went off at 1Am, went to the room where the fault was, there was a drunk dude sleeping on the floor with a cigarette on the floor next to him and about 8 feet of red pyro hanging down from a hole in the ceiling minus the smoke detector....
Students might try to remove the detector heads.....so you need notices up on the back of room doors saying not to do that.....
