What you will learn from the Duct Detectors Smoke Detection NFPA 90A Code Requirements article:

1. Preface for the NFPA 90A requirements for duct detectors in air conditioning and heating equipment.
2. The question: Where do you install duct detectors in the ductwork?
3. a detailed answer to satisfy requirements
4. exclusions and exceptions to the requirement
5. references for further information about HVAC equipment and fire safety
6. Finally, additional related information about fire and smoke dampers regarding HVAC