Hello all,

One of the requirements for EQ Credit 5 is to prove that the areas such as
the janitor's closet need to be negatively pressurized to a minimum
of 5Pa when doors are closed and 1Pa when doors are open. Generally, in
mechanical drawings, the cfm values are mentioned for exhaust fans.

I wanted some insight as to how this pressure difference information can be
obtained for both cases. Is there a straightforward calculation?

Thanks,
Deepa