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
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.
No problem. I am glad you found this helpful
Thanks for the demo, I've always wanted to see how the hidden sprinklers worked.
Very cool seeing one in action. Just learned about these in a course I'm taking.
That’s awesome! Thanks for watching!
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!
Great demo and overview - thanks :)
More this kind of experiments needed
FireAlarmeDude. Thanks for putting this together and educating the general public.
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)
whenever I see sprinklers in a building I get anxious but this could let me forget a boot them at least until they need to do their job
very elaborate explanation
Great video!
Every school I've been to has these, I actually assumed they were sprinklers and I was right
Always wondered how they work...
at that short distance from flame, i think its quiet long response, if its in real room means need to be in fully develop fire for it to activated
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.
I have sprinklers in my Apartment, all are concealed except for the one on my patio and one in my laundry closet.
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 🔥
Cool video and great explanation. Happy Easter.
Thanks
They are isolated too, they dont all go off at once like the movies
In case of fire, sprinklers require a person to manually adjust the heads during a large fire.
Sprinklers are not manually adjusted during fires. They’re stationary and independent devices
What are you talking about, they are set at Temps from 155-287 with glycerin.
Wow I’ve never herd of this type of fire sprinkler
They’re very underrated sprinklers in my opinion. Thanks for the comment!
Late response in my opinion. Is it because its outdoors?
No it’s because there’s nothing above the head to catch heat
What would happen if you tape the cap would it not pop?
Possibly
How hot does it need to be to activate a concealed Fire sprinkler ?
Depends on the head and rating
Most sprinklers are rated at 155-degF. There are other temperatures for different conditions.
good one thanks
I just thought they were a part of the ceiling but I never knew it was a sprinkler.
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.
They look great! I agree
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
inadequate water pressure
No kidding
Is this fire protectioin system what they call a " WET SYSTEM " ??
Yes
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
1:26
Did anyone notice the slide at 0:09 seconds? Common
Looks to me like your sprinkler doesn’t work lol 😂 fire burned just fine with water lol
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