psychrometric Chart + Duct Calculator full version

Psychrometric Chart + Duct Calculator v4.4 shareware version Updates Coordinate system of psychrometric chart is updated to dry bulb temperature and enthalpy; Add ASHRAE equation support at normal temperature and pressure region, now this psychrometric chart is perfectly consistent with all ASHRAE charts of No.1~7(SI Units) and No.1~5(IP Units); Water property calculation is updated to IAPWS-IF97 equation; Introduced real gas effect correlation; Add functions for grid snap and constant parameter lines at cursor point; Add grains/lb(d.a) and psia units in psychrometric chart. Corrected some symbol displays for international language.