A Pascal is small metric unit of pressure. One Pascal is approximately 0.004 inches of water column. Commonly used airtightness test pressures of 25 and 50 Pascals are approximately 0.10 and 0.20 inches of water column respectively. 1 psi is approximately 7,000 Pascals. 1 lb/ft2 is approximately 50 Pa.
What is a Pascal?
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