FieldengThermal & HVAC
Ventilation Airflow from ACH
V̇ = ACH × volume. ACH is a frequency (1/h); SI flow is m³/s.
Thermal & HVAC
V̇ = ACH × volume. ACH is a frequency (1/h); SI flow is m³/s.
App id: THERM-09. Reference version 1.0.
How to fill it
Fill the inputs. The tool shows the outputs.
On the tool screen, Calc is the working sheet. Presets stores values you reuse. Reference is the formula, assumptions, and provenance below.
Formula
V̇ = ACH × VolumeInputs
| Name | Unit |
|---|---|
| Room volume | ft3 |
| Air changes | ACH |
Outputs
| Name | Unit |
|---|---|
| Airflow (hero result) | ft3/min |
Diagnose
This tool does not attach diagnose observations.
Assumptions
- Perfect mixing. Not a code-required outdoor-air calculator.
Provenance
- Imperial CFM = ACH × ft³ / 60 is the same identity after unit conversion.