HVAC Condensate Calculator

Estimate condensate (L/hr, kg/hr, L/day) from inlet/outlet air conditions

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Inputs

Airflow

Enter airflow (CFM or m³/h depending on unit)

Ambient Pressure (optional) - kPa

Defaults to 101.325 kPa (sea level)

Inlet Dry Bulb °C

Inlet Relative Humidity %

Outlet Dry Bulb °C

Outlet Relative Humidity %

Notes: This uses common psychrometric formulas (Tetens saturation equation + humidity ratio). Results are approximations adequate for sizing drains and estimating condensate. For high precision use a full psychrometric chart or software.

Results

Units shown: L/hr

Humidity Ratio In (kg/kg dry air)

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Humidity Ratio Out (kg/kg dry air)

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Air mass flow (kg/s)

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Condensate removal (kg/s)

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Condensate (L/hr)

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Condensate (kg/hr)

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Condensate (L/day)

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Tip: Change inlet/outlet conditions to model cooling coil moisture removal. Defaults shown are example values.

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