One whole floor of my project is unconditioned mechanical space. Under what space usage type should it be logged?

The drop down menu options do not list a "mechanical space" option and the "other" option doesn't seem to work. It just disappears when I select it and then when I check the "compliance button" it tells me I need to select a space usage type.

Should I not itemize the mechanical space and add it to the general space type square footage and note the amount of square footage in the "unconditioned area" column of the same line?