Air Products and Controls Inc.'s SL-2000 Series duct smoke detectors offer protection against smoke recirculation in HVAC systems. The four-wire units are able to handle extremely low air speeds and are UL listed for temperatures up to 155 F (ionization units) and 100 F (photoelectric versions).
3 Bethesda Metro Center, Suite 1100
Bethesda, MD 20814
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