Chart grid snap, aided constant parameter lines across cursor point, middle button pan and mouse wheel zoom for convenient chart operating ħ. Normal and eastern(China) style support Ħ.

Mouse point catch, snap and calculation, output point information and many air properties ĥ. Draw protractor for enthalpy-humidity and sensible-total heat ratio Ĥ. Dry bulb temperature and humidity ratio axis range can be changed easily, the chart generation is automatic and fast ģ. Use IAPWS-IF97 equation for water/vapor properties calculating, and treat moist air as real gas for high precision Ģ. Save and load data function for each data input grid, all input data can be saved for loading next time program started.ġ. This psychrometric chart use ASHRAE equations at normal temperature and pressure region and is perfectly consistent with all ASHRAE charts of No.1~7(SI Units) and No.1~5(IP Units).īoth Metric(SI) and English(IP) units support. A convenient, precise and powerful tool for HVAC&R engineers.