Alarms in existing construction are not required to be interconnected unless required by the Code Official.
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In all residential occupancies, all alarms shall be replaced every 10 years
o All smoke alarms shall be in compliance withUL217 or UL268.
o All carbon monoxide alarms shall be incompliance with UL2034 or UL2075.
o All combination alarms shall be in compliance with all UL listings.
o Smoke alarms, smoke detectors, carbon monoxide alarms, and combination alarms shall be installed on every level including basements. These types of alarms are not required in nonhabitable attics and crawl spaces.
Smoke alarms, smoke detectors and combination alarms shall be installed outside each separate sleeping area in the immediate vicinity of the bedrooms. Structures built or alerted after January 1, 2001 shall also install smoke alarms or smoke detectors in each sleeping room. Smoke alarms or smoke detectors shall be installed within 21 feet of any door to a sleeping room, with the distance measured along a path of travel. [2016 NFPA 72 184.108.40.206]
o Structures built on or after January 1, 1989 shall have interconnection of smoke alarms, smoke detectors and combination alarms.
o A Code Official may require interconnection of alarms on structures built prior to January 1, 1989 if substandard aspects of the building warrant such a measure to protect public health, safety and welfare.
o Structures built before July 1, 1975 shall have a 10 year lithium battery powered smoke alarms or combination alarms that are sealed and tamper-resistant.
o Structures built between July 1, 1975 and June30, 1990, shall have an AC primary smoke alarms or combination alarms.
o Structures built on or after July 1, 1990 shall have an AC primary with battery backup smoke alarms or combination alarms.
o There are two options
Option 1 – Install 10 year lithium battery power smoke alarms or combination alarms on every level, outside each separate sleeping area in the immediate vicinity of the bedrooms and in each bedroom, or
Option 2 – Install AC primary with battery backup smoke alarms or combination alarms on every level, in each dwelling unit outside each separate sleeping area in the immediate vicinity of the bedrooms.
All four or more unit dwellings shall have AC primary with battery back-up smoke alarms, smoke detectors or combination alarms.
o All structures shall meet one of the following power sources requirements
The alarms must be approved by a nationally recognized testing laboratory for electrical appliances and approved by the Fire Marshal’s Office and be sufficient to warn deaf or hearing impaired residents or occupants.
Smoke alarms or smoke detectors mounted on walls shall be located not farther than 12 inches from the adjoining ceiling surface. (2016 NFPA 72 - 220.127.116.11)
Smoke alarms mounted on a peaked ceiling shall be located within 36 inches horizontally of the peak, but not closer than 4inches vertically to the peak. (NFPA 72 – 18.104.22.168)
Smoke alarms mounted on a sloped ceiling having a rise greater than 1 foot 8 inches horizontally shall be located within 36inches of the high side of the ceiling, but not closer than 4 inches from the adjoining wall surface. (NFPA 72 – 22.214.171.124)
Smoke alarms shall be installed on the highest portion of the ceiling or on the sloped portion of the ceiling within 12 inches vertically down from the highest point. (2016 NFPA 72 - 126.96.36.199.11)
Smoke alarms and smoke detectors shall not be installed within an area of exclusion determined by a 10 foot radial distance along a horizontal flow path from a stationary or fixed cooking appliance, unless listed for installation in close proximity to cooking appliances. Smoke alarms and smoke detectors installed between 10 feet and 20 feet along a horizontal flow path from a stationary or fixed cooking appliance shall be equipped with an alarm silencing means or use photoelectric detection. (2016 NFPA 72 - 188.8.131.52)
Smoke alarms shall not be installed within a 36 inch horizontal path from a door to a bathroom containing a shower or tub (2016 NFPA72 – 184.108.40.206.6)
Smoke alarms shall not be installed within a 36 inch horizontal path from the tip of the blade of a ceiling-suspended (paddle)fan. (2016 NFPA 72 – 220.127.116.11.8)