Room positive pressure

[RODRIGO BR]

Hi Everyone,

Could anyone help me or recommend me some literature about room pressurization methods and how to design proper the ventilation system to achieve a positive pressure in a room?
I know the leakage area is the main mechanical parameter in the pressurization system, but I have some doubts about the entire process.
For instance: I have a room with a determined volume, a determined airflow by the AHU unit based in the sensible heat load inside the room.

Some doubts comes up:

- What the airflow to be introduced in the room to pressurize it to a determined pressure value (Pa)?
- If the room is at negative pressure, what the common possible reasons for this?

Thanks in advance everyone

[Brian_UK]

Here's a starter, it is not a simple process. The designer should specify everything for the contractor.
https://www.idealsimulations.com/blog/negative-and-positive-pressure-rooms/

[RODRIGO BR]

Thanks a Lot Brian