CFAST 7.5.2 Wall Vent Opening Fraction Error

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Ryan Rogan

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Jan 8, 2021, 4:36:48 PM1/8/21
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Hello,

I've noticed that there seems to be a disconnect between the input and output for the time and opening fraction and of a wall vent if the engineering length units are selected as something other than meters. If you want a door to open at 10 minutes, and the length is set to feet, it'll open the door at about 55 seconds with a fraction of 0.3048 in the output files. If you enter the time and fraction when the units are feet, and then change it to meters, it'll change the time/fraction as well. There's some screenshots below showing thisCFAST.JPG.

Ryan

Richard Peacock

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Jan 11, 2021, 10:54:31 AM1/11/21
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This looks like an error in the CEdit code. I'll create a bug report and get is addressed.

Richard

Richard Peacock

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Jan 14, 2021, 11:57:44 AM1/14/21
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It is an error in the code. It impacts all three vent types. For the moment, the work around is to leave the units in m. We’ll fix for the next release. Thanks for finding this.

Richard

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