GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

Insulating duct work in conditioned space

Norman Bunn | Posted in Mechanicals on

I am planning to run the ducts for my HVAC in a conditioned basement and unvented crawlspace. The duct work will be metal except where branches might use well supported flex duct. Is there any reason to insulate this duct? Possible condensation during cooling season? If so, at what R value?

Norman
mixed humid zone 3, Greenville, SC

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.

Replies

  1. Expert Member
    Armando Cobo | | #1

    Yes, yes and R6 min.

  2. Steve Knapp CZ 3A Georgia | | #2

    It also is important to seal the duct with mastic to minimize air leakage.

  3. Anon3 | | #3

    Insulated ducts absorb noise.

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |