Estimate air changes per hour from room volume and supply flow in litres per second.
| ACH | – |
Use this calculator to check ventilation of a room. Enter the room volume in cubic metres and the supply flow in litres per second.
ACH = (flow in m³/s × 3600) ÷ volume, with flow converted as L/s ÷ 1000. Volume stays in m³; flow stays in L/s. There is no m³ or L/s unit picker in this calculator.
This is a well-mixed-room estimate. It does not model short-circuiting, occupancy, or a filter.
Volume (m³): Room volume in cubic metres.
Flow (L/s): Supply airflow in litres per second.
ACH: Air changes per hour.
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