I have a IOM manual on these model boxes in Pdf form and at the beginning it says for air balancing instructions see
EA10_IOM2-E, the manual I have doesnt have the K factor but the one I just listed should.
Even if they are the slightest bit different, your balancer should give you the proper multiplier to compensate for that, but I know what your talkin about!! I'll check my online info for the Trane VCW box and get you the correct info, hey man, don't you ever sleep? Bacnet rules!!