Room pressure calculation.xlsx

	A	B	C	D	E	I	J
1	Calculation of Room Pressure for CLEANROOMS
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3	Room Dimensions in feet
4	Length	13.5	Feet
5	Width	17	Feet			Inputs
6	Height	9	Feet
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8	Room volume	2065.5	cu. ft.
9	Assuming Atmospheric pressure, Patm =	101.325	kPa
10	Air changes per hour	ACH	40			Inputs
11	Room pressure need to maintain	55	Pa	0.055	kPa	Inputs
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13	Supply Air SA	1377	cfm			Inputs	if you have already calculated this
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15	Total pressure	101.38	kPa
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17	Total additional room air volume requires:	2066.62117	cu. ft.
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19	Additional air volume requires pressurizing room up to required pressure (without leakage):	1.121169504	cu. ft.
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21	With 5% leakage consider	1.177227979	cu. ft.	Additional air volume require.
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23	If we require pressurizing the room within second:	1	sec
24	Total additional air flow (PA) / Fresh Air intake	70.63367876	cfm
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26	Total supply Air SA	1447.63	cfm
27	Total Return Air RA	1377.00	cfm
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30	Created by Engr.Naqqash Sajid
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