Air-change calculator
Safety boundary
This tool does not calculate CO₂ injection rates. CO₂ enrichment can create an asphyxiation hazard. Use appropriate detection, alarms, ventilation, codes and qualified system design.
Published fan ratings can differ from delivered airflow after filters, ducting and static pressure. Use measured or properly corrected airflow for real-room decisions.
Required airflow for entered target
This reverse calculation is only a planning value. Real delivered airflow depends on filters, duct losses, static pressure, room leakage and equipment performance.
Unit reference
1 CFM ≈ 1.699 m³/h. The tool converts the entered unit before calculating room-volume equivalents and air changes.
Saved ventilation plans
| Saved | Room | Volume | Delivered CFM | ACH | Target ACH | Required CFM | Actions |
|---|