Fire Alarm

[eager2learn]

I would just like to know where in the code book can I find the distance a smoke detector has to be away from duct work as far as A.C. vents and or return air vents etc.

 

[Rockyd]

Without a copy of the NFPA 72, I would venture that this is the document you are seeking.

 

[ron]

If I recall, NFPA 72 used to have a distance requirement from HVAC registers, but it was taken out a few code cycles ago.

 

[barbeer]

In FL it is in the Building code.......maybe in yours?

 

[barbeer]

It should be 3' horizontal separation from any forced air vent and not in the line of flow, something like that.

 

[eager2learn]

fire alarm

fire alarm

i checked 760 in the code and couldn;t find it anywhere so i'm assuming that it is in the nfpa 72 - i have also heard that it is supposed to be 3' seperation i just wanted to see it for my self

 

[russ]

I thought that this information is in the directions of most smoke detectors.
As mentioned earlier, smoke and carbon monoxide info is usually in the building code.

 

[ron]

NFPA 72 used to require 3', but not anymore

 

[DUCKMAN]

NFPA 72 used to require 3', but not anymore

That depends on the application.

In a residence, 2007 NFPA 72 11.8.3.5(6) prohibits mounting a smoke alarm or smoke detector within 36 inches of a heat register.


2007 NFPA 72 5.7.1.7 states that detectors be placed "to prevent nusiance alarms" , this does not give a specifoc distance, but allows you to use your good judgement.

 

[wirebender]

Look here:

http://forums.mikeholt.com/showpost.php?p=649514&postcount=5

 

[celtic]

I'd say the NEC article would be 110.3(b) ~ basically...what the manuafc.s instructions say. I would imagine it(the instructions) would coincide with NFPA 72 and all other applicable codes.

 

[Fire Alarm]

NFPA 72 A.5.4.7.1 "Detectors should not be located in a direct airflow or closer than 3' from an air supply diffuser or return air opening"

Keep in mind this is from the Annex, which is NFPA 72's version of "Fine Print Notes". It's not a rule, but a recommended practice.

 

[DUCKMAN]

Look here:

http://forums.mikeholt.com/showpost.php?p=649514&postcount=5

Remember that NFPA 72 Chapter 11 only applies to residential installations.