Engineering tool
Psychrometric Calculator
Calculate the summer and winter air process for the preliminary sizing of air handling units and packaged units. Enter the airflow, fresh-air ratio, altitude, heat recovery type and indoor / outdoor conditions to see the coil loads, state points and psychrometric chart instantly.
Results are intended for preliminary sizing; the final unit selection is made with the ARECA engineering team according to the project conditions. The values you enter are processed only in your browser; they are not sent to a server or stored.
What the calculator gives you
State points and chart
Outdoor air, heat recovery outlet, mixed air, coil outlet, supply and room states, with a separate psychrometric chart for summer and winter.
Coil and humidification loads
Total, sensible and latent cooling coil load, SHR, condensate flow, ADP and bypass factor; heating coil load, humidification load and steam flow.
Heat recovery types
Plate, enthalpy plate, condensation, hygroscopic and sorption wheels, heat pipes and run-around coils, with default or user-defined efficiencies.
Scenarios and PDF report
Save different fresh-air ratios and heat recovery options as scenarios, compare them side by side and download them in a single PDF report.