Ventilation Calculator
Calculate airflow using room volume and air changes per hour (ACH). Formula: airflow = volume × ACH.
Ventilation Calculator
Uses the real formula: airflow = volume × air changes per hour (ACH).
Typical ACH: 3–4
Simple instruction
- Enter room dimensions.
- Choose room type to auto-fill a typical ACH.
- Adjust ACH if needed and set reserve.
- Get airflow in m³/h and L/s for fan or duct selection.
Volume
Volume = length × width × height. Measure wall to wall.
ACH
Typical ACH: living rooms 3–4, kitchens 6–10, bathrooms 6–8.
Reserve
Add 10–15% for duct losses and calculation tolerance.