Air sampling smoke detection

Here’s a video of a VESDA system at work.

Some NFPA references about this installation. Air Sampling~Type Smoke Detector.
17.7,3.6.1 Each sampling port of an air sampling-type smoke
detector shall be treated as a spot-type detector for the pur-
pose of location and spacing. Maximum air sample transport time from the far-
thest sampling port to the detector shall not exceed 120 seconds.



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