This is the section I think would apply it is from the IMC and only deals with air distribution systems not exhasut. As you can see from the exception to 606.2 the idea is to prevent moving smoke to uneffected areas.
SECTION 606 SMOKE DETECTION SYSTEMS CONTROL
606.2 Where required. Smoke detectors shall be installed where indicated in
Sections 606.2.1 through
606.2.3.
Exception: Smoke detectors shall not be required where air distribution systems are incapable of spreading smoke beyond the enclosing walls, floors and ceilings of the room or space in which the smoke is generated.
606.1 Controls required. Air distribution systems shall be equipped with smoke detectors
listed and
labeled for installation in air distribution systems, as required by this section. Duct smoke detectors shall comply with UL 268A. Other smoke detectors shall comply with UL 268. 606.2.1 Return air systems. Smoke detectors shall be installed in return air systems with a design capacity greater than 2,000 cfm (0.9 m3/s), in the return air duct or
plenum upstream of any filters,
exhaust air connections, outdoor air connections, or decontamination
equipment and appliances.
Exception: Smoke detectors are not required in the return air system where all portions of the building served by the air distribution system are protected by area smoke detectors connected to a fire alarm system in accordance with the
International Fire Code. The area smoke detection system shall comply with
Section 606.4.