Room Pressure Build Up

[DM2]

I'm trying to determine what pressure will be exerted on the walls of a room after a known quantity of air is introduce into the space. I've been advised what the leakage rate is but thats not important at this stage. I'm trying to convince someone that they need pressure relief venting for the space.

If the room is 15,000 cubic feet and the air is being released from 10 cylinders, each having a capacity of 500 cubic feet (uncompressed) of air, what's the formula to determine the room pressure in psi?

Regards,
Dan

 

[byrdj]

DM2, a question.

Are the "Vents" specially design to surppress flame? like though layers of fine mesh screen?

 

[DM2]

byrdj;
The vents are "Fire and Smoke" rated. Fire because it's a code requirement to maintain the fire rating of the wall, and smoke because it has the lowest leak rate.

I'm thinking the vents your talking about are more like "Flame Arrestors" however the hazard area doesn't have sufficient risk nor are the fire characteristics such that a flame detector would be required.

The hazard is typically overheated insulation on wiring.

 

[ccw]

When you said "switchgear"....Back in the day when we did overvoltage destructive tests on electrical contactors, the "blockhouse" we used had a pressure venting roof. The overpressure from metallic contacts vaporizing in an overloaded switch could otherwise blow out the observation window.