Smoke and heat detectors are constructed of a white, high-impact polymer and plug into mounting bases with locking tabs. In contrast, duct smoke detectors are constructed of a black, high-impact polymer with a clear plastic cover and they attach directly to the HVAC duct.

Read Edwards Signaling’s Smoke, Heat, and Duct Detectors Application Bulletin for information on heat detector applications and spacing, as well as smoke and duct smoke detector applications, spacing and maintenance.

Excerpt:

This group of detectors comprises of a variety of detection technologies available in various combinations to meet the needs of the fire protection community. The smoke and heat detectors are constructed of a white, high-impact polymer and plug into one of a variety of mounting bases that feature base locking tabs. The duct smoke detectors are constructed of a black, high-impact polymer with a clear plastic cover and attach directly to the HVAC system duct.

The smoke and heat detectors are analog addressable devices that contain their own microprocessors, which allow them to make alarm decisions based on the information collected by their sensors. Depending on the detector, decisions may be based on the information gathered by up to two independent sensing elements.

The address of each detector is assigned using the two rotary switches located on the detector. These detectors provide LEDs that indicate the detector’s…>>Read More