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Barometric Survey applied to multiple airways as PQ Survey is applied incorrectly


John Bowling

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In Edit dialog: Tools > Enter barometric survey yields different resistances if applied as "linear resistance" or as "PQ survey" to multiple airways.

As a test, apply the same parameters to two copied sets of airways (identical dimensions, lengths) as Enter barometric survey, choosing Apply As... linear resistance and PQ survey, respectively.

For the "PQ survey" case, the Calculated Pressure Change seems to be divided by the number of airways, then applied to each branch as a Linear PQ Survey. This results in a low resistance (I think (geometrically?) proportionate to the number of airways the barometric survey was applied to). The airflow and total length are carried over correctly.

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