Examples
Examples
Try the starting example
- JSON Vent openings [length m,clear width mm,supplied free-area fraction]
- [[20,20,0.6],[15,25,0.5]]
- Net free ventilation (mm²)
- 427500
- Net free ventilation (cm²)
- 4275
Try another scenario
- JSON Vent openings [length m,clear width mm,supplied free-area fraction]
- [[20,20,0.7],[15,25,0.5]]
- Net free ventilation (mm²)
- 467500
- Net free ventilation (cm²)
- 4675
Calculation method
Calculation method
Net free ventilation (mm²)
sum(r[0]*1000*r[1]*r[2] for r in a)
Net free ventilation (cm²)
sum(r[0]*1000*r[1]*r[2] for r in a)/100
Symbols and units
- a
- JSON Vent openings [length m,clear width mm,supplied free-area fraction]
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Calculation steps and notation
sum(list) adds all entries in the list.
Assumptions & limits
Assumptions & limits
- Geometric free-area tally, fractions 0–1. Does not assess ventilation adequacy or compliance. Supported limits: All numeric inputs must be finite. Only the explicitly described mathematical scenario is supported.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.