804DU4" Round Insulated Flexible Duct; Ventilation Fans

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  • Answers
  • 4” round ducting in 25-feet length gives you plenty to finish your installation

    • Insulated to help prevent condensation inside the duct when cold
  • what is the R value of the insulation?

    Asked by: steve
    Thank you for your question on the NuTone model 804DU. The 804DU has an R-value of 4.0.
    Answered by: NuToneCustomerService
    Date published: 2014-01-24
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