All tools

Ventilation and air changes

Air changes, moisture transfer and sensible thermal load.

Free. No registration.

Adjust the starting values to your operation.

Inputs

Results
Air changes per hour
2 h⁻¹
Sensible thermal load
3.29 kW
Water removed by ventilation
6.36 l/h
Indoor humidity ratio
12.9 g/kg
Outdoor humidity ratio
7.41 g/kg

Ventilation does not add moisture in these conditions.

Sent only with your enquiry. The original CSV is not attached.

Exhaust volume flow is at indoor conditions. Positive water removal means drying; negative means added moisture. Positive heat indicates supply-air heating demand, negative cooling. Heat recovery and latent heat are excluded; this is not a full climate design.

How we calculateACH = Q / V [h⁻¹]; water = ṁdry × (wᵢ − wₒ) [kg/h]; heat = ṁdry × (1.006 + 1.86wₒ) × (Tᵢ − Tₒ) / 3600 [kW]Method source