What is the theoretical limit that a fan blowing air out of an enclosed space can drop the air pressure inside the space to? (Can use layman’s terms)

Question

What is the theoretical limit that a fan blowing air out of an enclosed space can drop the air pressure inside the space to? (Can use layman’s terms)

In: Physics

Answer 1

Define fan, turbo pumps can take an enclosed space down to about 10^-13 of an atmosphere.