Need Help adding Vent...

Discussion in 'HVAC Heating & Cooling' started by thinkly, Sep 27, 2008.

  1. thinkly

    thinkly New Member

    Messages:
    43
    Location:
    Kansas
    Since i moved into my home 10 years ago, there has always been a vent that was blocked behind my suspended ceiling. Recently i decided to unblock it but immediately ran into trouble.

    My biggest problem is that i can't find a piece to go from the hole in the supply duct to the vent. It is about 2" from the face of the supply duct to the face of the ceiling tile that will be put in there. Everything i have found in stores is the wrong length. Another problem is that the hole is above the top of the top track of the ceiling, so in other words it will hit the tracking on the ceiling. (see pic)

    [​IMG]
    [​IMG]
  2. Mikebarone

    Mikebarone DIY Senior Member

    Messages:
    206
    Location:
    Phoenix, AZ
    Just a thought...

    Cap off the existing hole, (with sheet metal). Cut a hole in the bottom of the duct work, and install a vent there?
    I don't know how far the existing vent was pushing the air, (towards the camera). If it isn't too far, you could almost put a air return vent type grill in, that would direct the air in that direction...(towards the camera).


    Mike
    Last edited: Sep 27, 2008
  3. thinkly

    thinkly New Member

    Messages:
    43
    Location:
    Kansas
    The vent is about 15 feet from the furnace unit. Still even if i cut a hole in the bottom i still have to bridge the 2" gap between the face of the supply duct and the face of the ceiling tile.
  4. Mikebarone

    Mikebarone DIY Senior Member

    Messages:
    206
    Location:
    Phoenix, AZ
    OK...here's another one...


    I am not sure if I am following you as far as you 2†problem, (face of duct to ceiling tile). Could you lower the top of the existing opening, (with a strip of sheet metal) and then fur out the entire face of the duct work with 2â€x3â€s, (screw and glue). If you can find a vent that is just as wide, but like 2†shorter, that might give you the clearance you need on the top. I would find the vent first, and then build the frame work, (furring) to fit it. The furring strips would give you something to nail your drywall, (or whetever) on to. I would coat the inside of the 2x3’s (that will be the extension for you vent) with something like silicone, or duct seal, to keep them from absorbing any moisture.

    Mike

    Attached Files:

  5. thinkly

    thinkly New Member

    Messages:
    43
    Location:
    Kansas
    Interesting proposal. Are you saying to glue, screw the furring strips directly onto the sheet metal of the duct work and then slide something in behind the suspended ceiling framework to screw to it?
  6. Mikebarone

    Mikebarone DIY Senior Member

    Messages:
    206
    Location:
    Phoenix, AZ
    Yeah

    Yeah, that’s what I was thinking…to screw and glue it directly to the duct work, (and even to the sides of the hallway). As far as the suspended ceiling, it should have the, “L” track going all around the perimeters. The “L” track is usually put on after the drywall, so just make sure that you have a furring strip behind the drywall, where the, “L” track will be nailed on to the drywall.

    Mike
  7. thinkly

    thinkly New Member

    Messages:
    43
    Location:
    Kansas
    Very good. Now back to the 2" space question....what i am asking is "what do i run from the duct opening to the vent? I need something that ends up being the size of the eventual hole in the duct supply and then the same size as the vent on the other end.

    I found a lot of pieces in Lowe's that will go from a sqaure hole to a square hole and even with the right sizes but they are all sheet metal and too long. Many of them are 10" long or more and i only need to span about 2".

    EDIT> Maybe what you are actually describing here, i won't need anything because the firring will be the bridge between. I think i get it now...sorry for being a little slow.
  8. Mikebarone

    Mikebarone DIY Senior Member

    Messages:
    206
    Location:
    Phoenix, AZ

    Yep…the 2x3’s will be the 2â€, (really 2-1/2…the true measurement of the 3 inch part of a 2x3) to bring your vent out. Like I said before; find the correct size vent first, and then you can frame the furring accordingly to fit the vent. You didn’t say if the “L†track will work on this set up…hope it will!
    Find a glue or silicone that will work on wood / metal to secure the furring to the duct work.
    Remember that after you add drywall to the furring strips, you wil have a total of 3 inches from the face of the existing duct work, to the outside face of the new vent.

    Mike
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