This is from the OmniFlo 5 Engineering data sheet:
EXHAUST SPECIFICATIONS: STANDARD AIR OPERATION: - Load-end: 150 cfm (255 m3/hr) at the 4� (102 mm) stack (minimum requirement) - Unload-end: 300 cfm (510 m3/hr) at the 4� (102 mm) stack (minimum requirement) - Water gauge pressure drop: 1.0� (25 mm) for each 4� (102 mm) stack on the machine INERT ATMOSPHERE OPERATION: - Load-end: 150 cfm (255 m3/hr) at the 4� (102 mm) stack (minimum requirement) - Unload-end: 150 cfm (255 m3/hr) at the 4� (102 mm) stack (minimum requirement) - Water gauge pressure drop: 0.5� (12 mm) for each 4� (102 mm) stack on the machine Note: All specified exhaust requirements listed above are minimum values. The external exhaust connections are the same for both standard air and inert atmosphere machines. The internal connections to the lip vents are configured according to the air or inert atmosphere machine configuration.
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