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// CODE SNIPPET

907.2.18.1 Smoke Detectors

NYC Building Code 2014 > 9 Fire Protection Systems > 907 Fire Alarm and Detection Systems > 907.2 Where Required > 907.2.18 Underground Buildings With Compartment Smoke Control System > 907.2.18.1 Smoke Detectors
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A minimum of one smoke detector listed for the intended purpose shall be installed in the following areas:

1. Mechanical equipment, electrical, transformer, telephone equipment, elevator machine or similar rooms.

2. Elevator lobbies.

3. The main supply and return and exhaust air plenum of each air-conditioning system serving more than one story and located in a serviceable area downstream from filters on supply ducts and in return/exhaust ducts downstream of the last duct inlet.

4. Each connection to a vertical duct or riser serving two or more floors from return air ducts or plenums of heating, ventilating and air-conditioning systems, except that in Group R occupancies, a listed smoke detector is allowed to be used in each return air riser carrying not more than 5,000 cfm (2.4 m3/s) and serving not more than 10 air inlet openings.
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