Haze Ventilation
Estimate steady haze concentration from generation and ventilation rates.
Description
A steady well-mixed haze model balances generation with removal by ventilation.
A steady well-mixed haze model balances generation with removal by ventilation. It estimates a concentration using an assumed flow rather than measuring exposure.1
Estimate steady haze concentration from generation and ventilation rates.
When to use Haze Ventilation
Use this tool to estimate steady haze concentration from generation and ventilation rates.
Prepare production measurements or checklist records for one planning period. Confirm units, staffing assumptions and caller-selected criteria before running the calculation.
How to use Haze Ventilation and understand its results
- Prepare production measurements or checklist records for one planning period. Confirm units, staffing assumptions and caller-selected criteria before running the calculation.
- Enter hazeGenerationMilligramsPerMinute, ventilationCubicMetersPerMinute, maximumConcentrationMgPerM3 using the field table and calculation rules, then run the tool.
- Read steadyConcentrationMgPerM3, concentrationMarginMgPerM3, withinLimit. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| hazeGenerationMilligramsPerMinute | Haze generation (mg/min) | number; minimum: 0 | Required |
| ventilationCubicMetersPerMinute | Ventilation flow (m³/min) | number; minimum: 0 | Required |
| maximumConcentrationMgPerM3 | Maximum steady concentration (mg/m³) | number; minimum: 0 | Required |
Enter nonnegative generation and caller concentration limit with strictly positive ventilation flow. Return modeled concentration, limit-minus-concentration margin and inclusive within-limit flag.
steadyMgPerM3=generationMgPerMinute/ventilationM3PerMinute Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| steadyConcentrationMgPerM3 | Estimated steady concentration (mg/m³) | number; minimum: 0 |
| concentrationMarginMgPerM3 | Concentration margin (mg/m³) | number |
| withinLimit | Within supplied limit | boolean |
{
"input": {
"hazeGenerationMilligramsPerMinute": 100,
"ventilationCubicMetersPerMinute": 50,
"maximumConcentrationMgPerM3": 3
},
"output": {
"steadyConcentrationMgPerM3": 2,
"concentrationMarginMgPerM3": 1,
"withinLimit": true
}
}Limitations and assumptions
No transient buildup, deposition, spatial concentration or material-specific exposure assessment is modeled. The supplied limit is not validated and a passing model does not establish safe use.
Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors. A successfully returned false flag is an evaluated outcome; its meaning is explained above.
Alternative or Complementary methods
Use Dante Latency Budget: Budget Dante audio latency across devices and network hops. For a complementary task, use Open-Flame Readiness: Audit open-flame permit and safety readiness.
References
-
Haze Ventilation — tool.io
Similar or alternative tools
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