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Hello,

I live in a 1950 story and half home in Minnesota. I am in the process of removing the wall between my dining room and kitchen in order to install a kitchen peninsula. There is an existing hvac supply diffuser in the wall that I want to move to come out of the toe kick of the new cabinets. It seems like it should be simple enough, I can easily access the duct from the basement below, and only need to extend the branch line 1-2 feet and cut a new hole in the floor. The existing duct line is 3 3/4" x 10" rectangular. I've been browsing the web for where to buy new duct work, and I came a cross the 3-1/4"x10" half duct pieces that home depot sells for running ductwork within wall stud spaces. Will I be able to connect the larger sized duct to the existing, or is there somewhere better to get a duct the same size? This portion of the duct will be visible in the basement as it is running perpendicular to the floor joists for this portion of the run.

Secondly, what would you recommend for the ductwork from the floor out the toe kick? I haven't been able to find much other than the Toe Ductor kit. Has anyone used this product before and have any comments on it? It's about $60 for just that portion so I'm a bit hesitant to order it if I could easily make it for much cheaper.

Thanks in advance for any and all help!
 

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You can use a piece of sheet metal and cap the 1/2 space shut.

The oval flex of that kit will make the work easier.
 

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It depends on the height of you base cabinet kick. It seems like I simply used the 3-1/4 x 10 duct and a simple elbow the one time I did it.

You can use a piece of sheet metal and cap the 1/2 space shut.
Making a simple reducer is easy if you have the space to work. Metal (like HD foil) tape appled to a clean surface will seal and hold.
 
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