Air flow rate calculator
Calculate air flow from room volume and the target air-change rate.
Air flow (m³/h)
125
- Air flow (l/s)
- 34.7
- Room volume (m³)
- 62.5
01
Volume first
Room volume is floor area times height.
02
Times air changes
Air flow is room volume times the air-change rate n — how often the room air is replaced per hour.
03
Reference values
Living rooms ~0.5/h, bathrooms and kitchens much more. Use standard reference values for sizing.
Rough calculation, no warranty; does not replace ventilation design (e.g. DIN 1946-6). Air-change rates are reference values.
From measurement to finished quote
Worked out the quantities? In DasHandwerk.xhub you turn them into a clean quote in minutes — and the invoice in one click.