The HOCHIKI AMERICA DH-99 Digital Analog duct smoke detector provides early detection of smoke and products of combustion present in air moving through HVAC ducts in Commercial, Industrial and Residential applications. The DH-99 is designed to prevent the recirculation of smoke in areas by the air handling systems, fans and blowers. Complete systems may be shut down in the event of smoke detection. The HOCHIKI AMERICA DH-99-A and the DH-99-AR operate on a DCP powered loop (24 VDC source required for DH-99-AR)

Product code: 

DH-99-A : Digital Analog Photoelectric
DH-99-AR : Digital Analog Photoelectric, Power, Alarm, Horn/Piezo Test (Alarm Contacts : 2 form C rated at 10A@250V AC)


 Main features: 

  • Detects and limits the spread of smoke throughout building HVAC ducts
  • Compatible with building automation and fire alarm systems
  • Installs quickly and easily
  • No screens or filters to clean
  • Rugged gray steel back box with clear cover
  • Accessories – Remote LED alarm indication capability (DH-99-AR only)
  • Meets UL 268A Requirements

Click on the links below to download the following attachments:

DH-99A Brochure.pdf