Styled red and black, banded with Native American symbols (and exactly like many of the double doors within the hotel), the elevator is shown to spew blood from the very beginning of the film (No.6)
It’s a signifier for emotional/conceptual escalation.
Yes, elevators go up and down- and we aren’t given any information as to which settings are up or down. Consider the West Wing Living Quarters. Wendy exits out of an elevator in No.24, but stairs are shown heading up and down, providing disorientation for where exactly this floor is located.
In this image · No.3
We see Jack walk towards Ullman's office. Right in front is an elevator, and behind it, a hallway (that we will see Jack walkthrough later in the film). Ullman's office could not possibly showcase a large sun-filled window, and yet here we are.