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Room Pressure Question

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rwelsh09

Mechanical
Feb 28, 2019
2
Hi,

I am hoping someone here will now the answer to this.

Can we calculate the room pressure indirectly?

I will attach a photo to make things clear.

Thanks!

Can_We_Calculate_Monitor_ialu0a.png
 
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Ditto

But this looks like a homework problem
 
it will be -2.5 pa.But what you have is against the convention of referencing all pressures to a common datum such as the pressure in the ceiling void.Using different datum for different rooms is confusing.
 
Yes, it is somewhat misleading to call these numbers room pressures. They are pressure differentials.
 
Compositepro said:

So, it's straight algebra? A + B = C
I wasn't sure if pressure behaved like this, I know that adding sounds together 1+1 ≠ 2

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GT-EGR said:
Ditto

But this looks like a homework problem

I made this sketch in Visio. It represents rooms we are monitoring at work.

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Compositepro said:
Yes, it is somewhat misleading to call these numbers room pressures. They are pressure differentials.

You are correct, I should have called these pressure differentials. Knowing the differential in this case is a lot more important than specific room pressures.

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Thanks for all your help! [bigsmile]
 
The real problem is how to implement these differentials. How well the room are sealed are big unknowns. Also what happens when any door is opened.
 
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