Range can be changed, Mouse move point calculation.Use IFC-67 equation for water/vapor property calculating, and treat air as ideal gas.Psychrometric Chart + Duct Calculator v1.2 Features Psychrometric chart Add copy(wmf and bmp format), export(Jpg, bmp, wmf, emf format) and print function.Add chart line type, width, color, font properties groups edit and managing.Add constant specific volume and wet bulb temperature line in chart.Add wet air point calculating, drawing and converting.Add process points line and mix point calculating, drawing and managing.Psychrometric Chart + Duct Calculator v2.0 shareware version Updates Option for saving all input data to disk before exit and load them when restarted next time.Save and load data function for each data input grid, this is convenient and not need to input data every time restart program.Add chart toolbar for easily processing chart copy, export, print, pan, zoom, redraw and style selection.Zoom in, zoom out chart by rolling mouse wheel, and pan chart by pressing middle mouse button and moving mouse.Add angle reference of process line ratio for enthalpy-humidity and sensible-total heat.Other than eastern style, new western style chart support added in this version, this meets requirements of people who are customed with western style chart.Psychrometric Chart + Duct Calculator v3.0 shareware version Updates

Corrected some symbol displays for international language.Add grains/lb(d.a) and psia units in psychrometric chart.

Add functions for grid snap and constant parameter lines at cursor point.

Introduced real gas effect correlation.

Water property calculation is updated to IAPWS-IF97 equation.

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).

Coordinate system of psychrometric chart is updated to dry bulb temperature and enthalpy.

Psychrometric Chart + Duct Calculator v4.4 shareware version Updates

Ashrae psychrometric chart calculator