The 8" diameter is the inner diameter or the outer diameter? will this fit the 8" wall cap(say, Air King PWC8R)?A. The Continental Fan Manufacturing FL200 has an inner diameter of 8" and will fit any 8" caps.
Can this ducting be connected to 10" x 3 1/4" standard rectangular kitchen hood exhaust to continue through the attic?A. The Continental Fan Manufacturing FL200 would need an adapter to connect 10 x 3 1/4 vent.