Description
Multiply grossArea by openFraction and abs(cos(angleRadians)) for projectedFreeArea.
Ideal product geometry maps dimensions into lengths, areas, or coordinates under a stated shape model. A dimension ratio does not by itself establish manufacturability, strength, or usability.
Multiply grossArea by openFraction and abs(cos(angleRadians)) for projectedFreeArea.
When to use this tool
Use Vent Louver Free Area Angle Factor when you need one explicit product-geometry component.
How to use the tool and how it works
- Enter grossArea, openFraction, angleRadians. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read projectedFreeArea. Use the output convention below.
Multiply grossArea by openFraction and abs(cos(angleRadians)) for projectedFreeArea.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| grossArea | Gross Area | Required. Finite number; minimum 0. |
| openFraction | Open Fraction | Required. Finite number; minimum 0; maximum 1. |
| angleRadians | Angle Radians | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| projectedFreeArea | Projected Free Area | Required. Finite number. |
{
"input": {
"grossArea": 100,
"openFraction": 0.6,
"angleRadians": 1.0471975511965976
},
"output": {
"projectedFreeArea": 30.000000000000007
}
}Limitations and assumptions
- The angle is in radians and the projection is ideal; pressure loss, airflow, blockage geometry, and ventilation adequacy are not determined.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use the complete design model, material data, tolerances, and physical verification for engineering decisions.
References
Similar or alternative tools
- Enclosure Draft Face Offset
Return height × tan(draftRadians) for signed offset with nonnegative height and abs(angle) < π/2.
- Bench Seat Back Angle Projection
Project backLength with cosine and sine of angleFromVertical for verticalHeight and horizontalSetback.