Cubic meters per hour to air changes per hour
Type a value in m³/h to get it in ACH instantly.
15ACH
That's about the same as a laboratory. One complete change of air takes about 4 minutes.
Convert the other way: ACH to m³/h
What it means
How fast is the air changing?
Air changes assume the incoming air mixes completely. In practice some of it short-circuits straight to the extract, so the effective rate is lower.
The math
How to convert m³/h to ACH
Air changes are flow divided by room volume: ACH = m³/h ÷ room volume. The figures below use the room selected above.
Example: 150 m³/h = 15 ACH.
The table below is for Bathroom (10 m³).
Every unit
Your ventilation in every unit
Tables
m³/h to ACH conversion table
| m³/h | ACH |
|---|---|
| 0.5 m³/h | 0.05 ACH |
| 1 m³/h | 0.1 ACH |
| 2 m³/h | 0.2 ACH |
| 3 m³/h | 0.3 ACH |
| 4 m³/h | 0.4 ACH |
| 6 m³/h | 0.6 ACH |
| 8 m³/h | 0.8 ACH |
| 10 m³/h | 1 ACH |
| 12 m³/h | 1.2 ACH |
| 15 m³/h | 1.5 ACH |
| 20 m³/h | 2 ACH |
ACH to m³/h conversion table
| ACH | m³/h |
|---|---|
| 0.5 ACH | 5 m³/h |
| 1 ACH | 10 m³/h |
| 2 ACH | 20 m³/h |
| 3 ACH | 30 m³/h |
| 4 ACH | 40 m³/h |
| 6 ACH | 60 m³/h |
| 8 ACH | 80 m³/h |
| 10 ACH | 100 m³/h |
| 12 ACH | 120 m³/h |
| 15 ACH | 150 m³/h |
| 20 ACH | 200 m³/h |
Quick answers
Quick answers
- How many ACH is 1 m³/h?
- 1 m³/h is 0.1 ACH.
- How many ACH is 10 m³/h?
- 10 m³/h is 1 ACH.
- How many ACH is 150 m³/h?
- 150 m³/h is 15 ACH.
The units
About these units
Cubic meters per hour (m³/h)
How European fans are rated.
Air changes per hour (ACH)
How ventilation standards are written: whole room volumes an hour.
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