First - thanks for stopping by and helping. Here is my problem. I have gone through extensive renovations on the main floor of my house. Load barring walls have been properly removed to create an open concept living space. The house was built in the 1940s and had the old ducts in the wall. I have since re-run new duct work to all rooms with in floor vents. I ran the new duck work through a bulk head along one of the outside walls (on the inside of the insulation and vapor barrier.
The house has no cold air return on the upstairs floor. My plan was to convert one of the old in wall vents (which feed two bedrooms through a common wall) into a cold air return. My plan is to install sheet metal along the joices running parallel to the joices. Taking the sheet metal to one of the outside walls.
Please note no drywall has been installed yet, still have just the framing in place.
The outside walls are framed with 2x4 placed 1‚Äù from the brick exterior wall.
So here is my question: Once I have run the sheet metal along the joices to the outside wall. What next? Sicne I am using the ‚Äúdead space in the joice as my cold air return ‚Äì how do I run that down the framed outside wall? Since I will be placing insulation in the 2x4 framing I do not have the luxury of having ‚Äúdead space‚Äù to use for the cold air return. I desperately would like to avoid having to build a bulkhead running down the outside wall but I can not see any other way. Please tell me I have an option.
If you do not think I have an option, what if instead of using the space in the joices and studs, what if I used a 4‚Äù round duck pipe would that work? I am asking this because I will have 4.5‚Äù of spce form the brick exterior wall (3.5‚Äù for the 2x4 and 1‚Äù space between the framing and brick wall). Would not leave much room for insulation though.
Well again thanks in advance for your help!
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