HVAC and building services
Interactive psychrometric chart
Tdb-W chart with saturation boundary, RH curves, enthalpy and specific-volume lines, state points and HVAC processes.
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Tdb-W chart with saturation boundary, RH curves, enthalpy and specific-volume lines, state points and HVAC processes.
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W, h and v are based on 1 kg of dry air.
Add the first state point or load an example to begin analysis on the psychrometric chart.
No process data.
The chart uses the shared approximate ideal moist-air model at constant absolute pressure. Wet-bulb lines are available only for Twb ≥ 0 °C. The model does not include complete condensation, fog, ice or real-gas behavior and does not establish automatic code compliance. Independently verify results requiring high accuracy.