Which environmental factors are emphasized in NFPA 72 for fire alarm systems?

NFPA 72 emphasizes the significance of temperature and humidity levels as critical environmental factors for fire alarm systems. These parameters can significantly influence the performance and reliability of fire detection and signaling equipment.

Temperature affects the sensitivity of smoke detectors and can either impede their function or lead to false alarms. For example, detectors designed for specific environments must be able to operate effectively within the temperature ranges expected in those locations. Similarly, high humidity can cause corrosion, condensation, or malfunction in electronic components, all of which can impair the system's effectiveness. Therefore, understanding and managing these environmental conditions is essential to ensure that fire alarm systems operate as intended and maintain their reliability during an emergency situation.