58DD - 58EAD

UL Classified For use in UL 263 wood truss floor/ceiling assemblies rated 1 hour or less.

  • 1 hour wood truss CRD assembly
  • Approved UL L-587 design
  • Incorporates UL 555C evaluated ceiling damper
  • Field installed 1.5" R-6 or 2" R-8 ductboard box
  • Available in range of sizes from 4"x8" to 20"x16"