Reply by AZWoody

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Posted on Calculating CFM and Static Pressure.... Confused

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1419 posts in 1459 days

#1 posted 10-29-2016 02:31 PM

Most machines overstate the cfm they can generate.

Also at 4” you’re more than likely going to peak at 400 cfm or thereabouts unless you have an oversized motor/impeller combo. I’d stick to 6”. That is over double the overall capacity of a 4” hose and you might be able to get the cfm you want.

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