A variable air volume (VAV) system is being considered for a hospital's administrative offices (a nonsensitive area). According to CMC Section 407.5.1, which of the following is a requirement for such a system to be acceptable?

• It is never acceptable in any part of a hospital.
• It must maintain a constant air movement in patient rooms.
• It must use a constant volume return fan.
• It must comply with outside air, total air, and pressure relationship requirements through its full operating range.