The blast shield is actually from The Blast Shield. Just google it and you'll find the site. Great people, great stuff!
I'm building out the basement now and will have mackup air coming directly off the A/C venting when it's done and the walls are up. Its going to be about 10' x 20' so will actually be about the size of a single garage bay when the walls are up.
But for now I have 2000 sq ft of air conditioned and not air tight space feeding it so it's fine as a temporary situation.
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