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BreezSmart Ventilation Fans SMT-CRD2 – Ceiling Radiation Damper

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The damper employs a folded curtain style blade for point-of-origin control of radiant heat in a ventilation system. SMT-CRD2 installs in the ceiling membrane for floor/ceiling or roof/ceiling assemblies with a fire resistance rating up to and including 3 hours.


  • Delta BreezSmart SMT-CRD2 – Ceiling Radiation Damper helps to limit the radiant heat transfer through an air inlet/outlet opening in the ceiling membrane
  • SMT-CRD2 Ceiling Radiation Damper is UL and cUL listed, and exceeds UL 555C for use in 3-hour fire rated assemblies
  • CSFM listing: 3226-1650:0106
  • UL 555C listing: R16833
  • Meets NFPA Standards: 90A and 101
  • Meets Building Code Standards: IBC, NBC, NFPA, SBC, and UBC
  • Installation is valid for the following UL rated wood truss ceilings:
    • Floor-Ceiling = L587 (Owned) Also found in the following floor-ceiling designs: L528, L558, L562, L563, L574, and L585
    • Roof Ceiling = P556 (Owned) Also found in the following roof-ceiling designs: P533, P544, P545, P547, and P580
  • Intended for installation with the following UL Listed Delta Electronic Fan Models SMT130, SMT130M, SMT130H, SMT150, SMT150D, SMT150LED, SMT150-200, SMT150-200LED, SLM80, SLM100, SLM80-110-C, SLM80-110LED-C, SLM80-110D-C, SLM80-110DLED-C, SLM80- 110H-C, SLM50-110-C, and SLM50-110LED-C. (for SLM series to use combustible installation need to purchase VFRU-21-13HB separately)


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