Running Ductwork Through Floor Joice

You may be able to work with a wide shallow duct so you can have a broad not too deep soffit for the cross joist duct run.

Running ductwork through floor joice. Is that a towel in there. The rise of wood i joists has challenged scl manufacturers to come up with a safe practical ways to permit larger. In this case it s big enough that there s even a joist running right through the middle. Ducts should be able to run between studs in the wall and then turn into a joist bay the space between two joists.

Run hvac duct through composite lumber beams. Position bathroom vent fans so the ducts can run parallel to the joists right up to where they exit the house. I used a 6 hole saw to run a new duct into an addition we built. If you need to cut through a joist firm up the floor as shown in fig.

The sheetrock will be tight to the joists so i can t go under them. You can drill the holes anywhere along the length of the joist first photo. But if i add a 5 booster fan would it be possible to retain proper air flow and route this duct through the joist. Make sure the studs and bays line up well enough to leave a clear path.

I want to t before it and go through the 12 joists. Just be sure to get the sizing sorted out correctly ie a 12x12 duct cannot be replaced by a 3x48 duct same area as there s a lot more friction in the 3x48 but the correction factors for duct shape are surely. Sometimes the best route for a flexible duct run is up and over an obstruction. Because this is a add on i only have 1 point of entry coming from the original house so i have to parallel the 12 joists to the middle and t off to reach the bedrooms.

Rather than try to run the flex duct through it which would have required at least another 2 i put a 1 long section of 6 rigid duct through the hole and attached the flex to both sides of it. But without proper support ducts can develops sags or kinks that reduce airflow 4a 4b. As we look closer here s what we see in this house. To prevent problems use saddles or straps to support at regular intervals 4c 4d follow the manufacturer s instructions but in case they get lost here is a list of best practices for.

I understand that the maximum size hole i can put through a 9 floor joist is 3. To minimize problems with ductwork. I will not be going through the lam beam. And wiring through a joist.