HVAC register Fire Damper question

Discussion in 'HVAC Heating & Cooling' started by ChuckGM, Apr 8, 2021.

  1. ChuckGM

    ChuckGM Member

    Joined:
    Sep 1, 2020
    Location:
    Minnesota
    Okay... I don't "need" a fire damper in this room, but I want one. (We're talking a private residence with a small rental space).
    I understand there are two types ("static" and "dynamic") which is applicable on an 80,000 btu furnace system?

    and - if I want to install it right at a 6 x 10 or 6 x 12 wall register, in a 2x4 wall (with a couple of extra inches behind the wall) - is that possible? How is it done? Can you point me to the damper/register that would work here?

    Thanks!
     
  2. fitter30

    fitter30 Well-Known Member

    Joined:
    Feb 2, 2020
    Occupation:
    Retired service tech
    Location:
    Peace valley missouri
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  4. ChuckGM

    ChuckGM Member

    Joined:
    Sep 1, 2020
    Location:
    Minnesota
    Okay - but that one, for example, is 16 x 16 and too deep for a 2x4 wall. If a fire damper penetrates the fore wall AT the fire wall, how do people install something like that? There's "nothing" that "combines" a register and fire damper? - or a standard process for (what must be?) a common need?
     
  5. fitter30

    fitter30 Well-Known Member

    Joined:
    Feb 2, 2020
    Occupation:
    Retired service tech
    Location:
    Peace valley missouri
    They make different sizes of dampers haven't seen one for like a floor register. They are installed in 1 or 2 hour fire rated walls. Standard 1/2" drywall is rated for 30 minutes . What are you trying to accomplish.
     
  6. ChuckGM

    ChuckGM Member

    Joined:
    Sep 1, 2020
    Location:
    Minnesota
    I have a one hour wall. If the the 1 hour wall is penetrated, the damper is supposed to be at the point of penetration. I want to know how they accomplish that in a 2x4" wall - and I'm hoping someone can point me at where I can find an appropriate damper/register boot.
     
  7. fitter30

    fitter30 Well-Known Member

    Joined:
    Feb 2, 2020
    Occupation:
    Retired service tech
    Location:
    Peace valley missouri
  8. ChuckGM

    ChuckGM Member

    Joined:
    Sep 1, 2020
    Location:
    Minnesota
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