Thanks for creating this demo. I'm designing a ceiling finish that has these concealed heads. Now I know the deflector doesn't drop that low from the finished ceiling so got to keep that into consideration for the depth of the new ceiling finish.
Concealed Fire Sprinklers are better, because objects or debris can’t hit it. Thus, the sprinkler would activate, putting the fire panel into alarm. One particular restaurant I’ve been to had safety cages around the sprinklers. Both options are helpful!
The new building of the school i went to in 2012 had concealed sprinklers in most parts of the schools, the sports hall had another type of sprinkler head The new building of that school was completed in 2012, if I remember correctly (and the old building was torn down, the old building did not have any sort of sprinkler system) Only a small portion of the old building remained (essentially 4 classrooms, and there was also the “portable” classroom which was completely separate from the rest of the school, the “portable” classroom did not even have a fire alarm, the new building did have sounders on the outside of the building, unlike the old building, and due to there being gaps in the room numbers in the new building, i think they had plans to extend the new building, and the design of the building did seem like they designed it with the building being extended in mind, although if the building has been extended between then and now, then there is a chance that one of the staircases may no longer have a door that leads directly to the outside)
A cardboard box doesn’t burn very hot. Not nearly as hot as any genuine fire. It has less to do with distance from the sprinkler and more to do with heat generation.
Another explanation for the response time is the lack of a ceiling. Sprinklers must be in a ceiling, where the heat is located. In this case you are in what we call the plume, but not all of the energy gets to the sprinkler.
Inside an enclosed room an incredible amount of heat will build up rapidly. Much hotter and faster than in this open air test. So in an actual situation the sprinkler will likely actuvate much sooner.
It's probably a good thing that the laundry sprinkler is an exposed type, clothes driers are a cause of many home fires because of a lack of maintenance in the air ducting of lint build-up, perfect starter tinder for a fire 🔥
I am not a huge fan of these sprinkler, because they take another step to activate. Although, the difference between a concealed and a standard unit might not be significant. Cool demo tho!
They activate at the exact same temperature and at the same speed as a regular sprinkler. The cap comes off at around 135 and the sprinkler head goes off at 155 like a standard one
@@FireAlarmDude5967 Alright, I was wrong then. But they do look nicer. But it can be harder to find a sprinkler for servicing. And it is another part that could get blocked.
I always knew these were fire sprinklers, I was curious about how much delay the cover would cause by shielding the glass activation capsule temporarily from the heat of the fire as opposed to an exposed sprinkler, perhaps another test is needed for a comparison
Dry systems are used in areas exposed to extreme cold temperatures, such as in an industrial freezer, like the one that I worked in, we had to always be careful not to hit them with a tripple stacked pallet when using the forklift
Obviously there was a lack of water pressure so it’s not going to cover the burning material properly but in a genuine situation where the sprinkler is installed property it would have put out the fire
