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D342 Family four‑wire duct smoke detector housings

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  • For 1 ft. (30.5cm) to 10 ft. (3 m) ducts with air velocity between 300 ft./min. to 4000 ft./min. (1.52 m/s to 20.3 m/s)
  • Easy duct tube installation through the housing cuts installation time
  • Detector test and reset without removing covers
  • Clear cover allows quick visual inspection
  • Tube filters, dust immune smoke detector, and easy disassembly for cleaning reduce maintenance time and cost

Product Variants

D342 Family four‑wire duct smoke detector housings

Duct detector housing 4-wire 24/220/240V

CTN D342
Product No. 4.998.113.254

D342 Family four‑wire duct smoke detector housings

Duct detector kit, 4-wire 24/220/240V

CTN D342P
Product No. 4.998.137.960

Accessories

Duct smoke head, 2-/4-wire, 12/24V

CTN D285DH
Product No. 4.998.140.344

Detects the large smoke particles which typically result from wood, paper, and fabric combustion

Remote indicator plate

CTN D344-RL
Product No. 4.998.140.354

Used with the D340 Series Duct Smoke Detector Housings

Remote test/indicator plate, 24V

CTN D344-RT
Product No. F.01U.024.868

Use with a D340/D341/D342 or D343 (legacy product) Duct smoke housing or D296/D297 Long‑range beam smoke detector.

Sample tube, duct 1.5'/45.7cm

CTN D344-1.5
Product No. F.01U.029.219

length 45.7 cm (1.5 ft)

Sample tube, duct 3'/91.4cm

CTN D344-3
Product No. F.01U.029.175

length 91.4 cm (3 ft)

Sample tube, duct 5'/152cm

CTN D344-5
Product No. F.01U.029.174

length 1.52 m (5 ft)

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Installation manual
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Technical bulletin (Two-Wire Compatibility)
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