Adding wall registers and ducts to existing construction
My house (basic mid-60s ranch) has very inadequate air circulation, and I want to add a few wall registers on outside walls. The ones that are in there now are connected to 2 1/4 x 10" register head duct work, which is what I am assuming I'll be adding, since the clearance is very limited.
I'm trying to figure out how these would go in. First, cutting the hole in the subfloor- how the heck do I do that? The space between the sill plate and the sub floor is not big enough to get a sawzall into, and my jigsaw, even if it fits, the blade is too far from the edge.
Next problem: trying to stuff the register head and stack boot into the wall cavity. I assume it comes up from the basement. The register heads I've seen are too tall to fit around the corner formed by the sill plate and the header joist.
I'm sure this is done all the time. What am I missing?
Any suggestions or info appreciated! Thanks!