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@Air is a member of Techware¡¯s family of software packages bringing accurate thermodynamic properties of fluids to many popular Windows programs.  @Air provides thermodynamic properties (sometimes called psychrometric properties) and transport properties of moist air. 

 

The air property functions can be used directly from within applications including Microsoft Excel, 1-2-3 and MathCad.  Add-ins attach the functions so that you can use them as if they were built in to the applications. 

 

 

 

What's New in Version 4.0

Added 64-bit version of Air property DLL.

Added 64-bit version of DeskTop Air.

Converted all help files to compiled HTML format.

Removed @Air Help link from all versions of Excel and 1-2-3 menus.

 

 

Key Features

  • Functions can be used as if they were built in to most popular spreadsheet programs.
  • Accurate properties consistent with ASHRAE tables.
  • Equations based on virial equation of state using second and third order mixing coefficients.  No perfect gas assumptions.
  • Accuracy fully documented.
  • Supports many combinations of input data.
  • Calculates specific volume, enthalpy, entropy, specific heat, viscosity or thermal conductivity.
  • Use English, English Gage, SI Common, SI Formal, SI kPa and Metric unit sets.
  • Functions can be called from many Windows programming languages.
  • Allows pressures up to 50 bar  (725 psia) and temperatures from 180 ¡ÆK (-135.7 ¡ÆF) to 2000 ¡ÆK (3140.3 ¡ÆF).
  • Uses or calculates humidity ratio, relative humidity, degree of saturation, wet bulb or dew point temperatures.
  • Express moisture as humidity ratio, mole fraction or mass fraction.
  • Express results on wet or dry basis.

 

 

Applications Supported

The @Air package includes various add-ins which link the functions to many popular 32-bit and 64-bit Windows applications.  32-bit add-ins are included for Microsoft Excel Versions for Office 95, Office 97, Office 2000, Office XP, Office 2003, Office 2007 and Office 2010 (32-bit version); Lotus 1-2-3 97 and 1-2-3 Millennium and MathSoft Mathcad Plus Versions 6, 7 and 8.  A 64-bit add-in is included for Office 2010, 2013, 2016 and 365 (64-bit version.)

 

No programming is required to use the @Air functions with any of these applications. Just follow a few simple steps to load the add-in, and from then on, the functions will be available every time you start the application. You use the functions just like any of the built-in functions. The functions can be used in any spreadsheet formula and any argument to the functions can be a number, a formula or a cell reference.

 

 

 

Product Compatibility with Versions of Windows

 

The following matrix shows the compatibility of Techware products with various Windows operating systems.

Windows Operating System

95

98

NT

2000

XP

Vista

7

8 and 10

WinSteam 4.0

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

@Air 4.0

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

@Gas 4.0

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

XLInterp 4.0

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Note: * Requires users to download "WinHelp32.exe" from Microsoft for free to enable help features.

 

Product Compatibility with Versions of Excel

Excel 4

Excel 5

Office 97

Office 2000

Office XP

Office 2007

Office 2010

Office 2013/2016

WinSteam 4.0

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

@Air 4.0

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

@Gas 4.0

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

XLInterp 4.0

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Note:

* May cause some problems with Office 2007 especially when operating under Win XP

** Works only with 32-bit version of Office 2010