NFPA 1192
6.2.1.2 Each bedroom or area designed for sleeping shall have at least two unobstructed
paths to exit.
(Keystone is saying that since it is a curtain separating the bunkhouse from the rest of the trailer and not a door it doesn't count as a separate room. Either way, the egress window is behind a door in the front bedroom)
6.2.1.3 The path to exit shall not require passing any designated exit to gain use of another
designated exit except where any part of a bed in its normal sleeping configuration is within
24 in. (610 mm) of the plane of the nearest designated exit as projected across the vehicle.
(I don't fully understand what they are saying at the end, but the egress window is forward of the exit door, so it wouldn't seem to be a valid path to escape from the rear bunkhouse)
6.2.5.1 The alternate exit, if not an exterior passage door, shall provide an opening of
sufficient size to permit unobstructed passage, keeping the major axis parallel to the plane of
the opening and horizontal at all times, of an ellipsoid generated by rotating about the minor
axis an ellipse having a major axis of 24 in. (610 mm) and a minor axis of 17 in. (432 mm).
(My slider windows might fit this standard if they opened all the way, but they don't open far enough.)
By all of these sections, I believe the 2018 3290bh fails to meet the NFPA standard.
