Under NFPA 90A, supply-side smoke detection is mandated for HVAC systems with capacity of

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Study for the Fire Alarm Lesson 5and6 Test. Prepare with flashcards and multiple choice questions; each question comes with hints and explanations. Gear up for success on your exam!

Multiple Choice

Under NFPA 90A, supply-side smoke detection is mandated for HVAC systems with capacity of

Explanation:
NFPA 90A requires smoke detection on the supply side of an HVAC system when the system can move a large amount of air, because bigger systems can spread smoke quickly through ducts. The threshold used in the standard is 2000 CFM. If the supply airflow is at least 2000 CFM, a smoke detector in the supply duct is mandated to enable rapid detection and a quick control response (such as shutting down fans or closing dampers) to limit smoke distribution. Systems below 2000 CFM aren’t mandated to have supply-side smoke detection, though other detection options may still be used.

NFPA 90A requires smoke detection on the supply side of an HVAC system when the system can move a large amount of air, because bigger systems can spread smoke quickly through ducts. The threshold used in the standard is 2000 CFM. If the supply airflow is at least 2000 CFM, a smoke detector in the supply duct is mandated to enable rapid detection and a quick control response (such as shutting down fans or closing dampers) to limit smoke distribution. Systems below 2000 CFM aren’t mandated to have supply-side smoke detection, though other detection options may still be used.

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