Vortia 3DAirflow converter
Enter the airflow in the unit you have and you will see the rest. Below, the airflow a room needs from its dimensions and the air changes per hour.
Equivalences
| Unit | Equivalent to |
|---|---|
| 1 m³/h | 0.2778 l/s · 0.000278 m³/s · 0.5886 CFM |
| 1 l/s | 3.6 m³/h |
| 1 m³/s | 3,600 m³/h · 1,000 l/s |
| 1 m³/min | 60 m³/h |
| 1 CFM (ft³/min) | 1.699 m³/h · 0.4719 l/s |
European ventilation standards and regulations usually give airflows in l/s (per person, per m² or per room); fan catalogues, in m³/h; and American manufacturers, in CFM.
Airflow from air changes
Q = V · n · V = length · width · heightQ in m³/h · V in m³ · n in air changes per hourExample: a 10 × 6 × 3 m room has 180 m³; with 4 air changes per hour it needs 720 m³/h (200 l/s).
Bear in mind
- Air changes per hour are a quick criterion, useful in industrial buildings, warehouses or rooms without specific regulations.
- In non-residential buildings, standards such as EN 16798-1 (and, in Spain, RITE IT 1.1.4.2) set the outdoor airflow by indoor air quality category, usually in l/s per person.
- In dwellings, national regulations (in Spain, CTE DB-HS 3) give the minimum airflow per room in l/s.