I wasn't attempting to disprove you! I'm fully aware of the inaccuracies built in at the assumption level and I've declared those, but at this point a conservative "guess" based on approximate variable relationships to help out with the assessment of door weight for code compliance is better...
I think I have my number now, and I think perhaps forum members would like to see how I arrived here. I have some automatic opening doors for the space.
Using BS: EN 12101-6, which details an equation for calculation of air flow under a given pressure, I have
Q(flow)=0.83*leakage area*dp^0.5...
Okay, so I've thought about this a little more.
There is a flow imbalance but this cannot be permanent or total; a flow equilibrium must be obtained otherwise the pressure in the room would drop by a value related to 36,000cfm with each minute that passed.
So leakage is essential in flow...
This may seem like a repeat thread, but I have some questions.
I have a large room in a smoke exhaust condition. There is mechanical exhaust and mechanical makeup, and, by design, a flow differential between the two.
I am being asked to provide the differential pressure between the room and...
