Well, I don't know the exact dimensions, but it's HUGE.
Took delivery of a 36PW9525 at the end of june and while the box could go through the main entrance of our appartment building, it couldn't go past any other door, so we had to unpack it downstairs.
Last week I got my new 36PW9527, and even though the box was a little bit smaller, it still couldn't fit through the door, so same scenario again.
Anyway, I threw both boxes away immediately so I can't give you exact dimensions, but I think it won't fit through most of the normal doors...
CJ