@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.
This version supports 32-bit and 64-bit applications. New 64-bit components include the air function library (DLL), the Excel Add-in and DeskTop Air. The package also includes 32-bit versions of these components plus the add-ins for 1-2-3 and MathCad.
Programmers can call the functions in the dynamic link library directly from many Windows programming languages such as Microsoft Visual BASIC, Microsoft Visual C++ for Windows and Microsoft Access.
@Air is going to change the way you solve many problems involving moist air! Your calculations will be greatly simplified and their accuracy will be improved by using the @Air functions. The functions in @Air will help you calculate the performance of HVAC equipment, evaporative coolers, air compressors and air turbines. You can conveniently design equipment right on your favorite spreadsheet and your results will be more accurate because you won’t have to interpolate data from tables, read from psychrometric charts or construct graphical solutions. You won’t have to make perfect gas assumptions either.
@Air 3.2 is available as a free upgrade to licensed users of @Air 3.0 or @Air 3.1.
@Air 3.1 is a minor upgrade for @Air 3.0. It includes a new unit set, METF similar to MET but using kg/cm2 for pressure instead of bar. In addition, it includes some minor bug fixes and improvements to the accuracy of the transport property functions for viscosity and thermal conductivity.
@Air 3.1 is available as a free upgrade to licensed users of @Air 3.0.
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.
All of the steam property functions are contained in a Windows Dynamic Link Library (DLL). The @Air package includes 32-bit and 64-bit versions of the DLL, which supports applications designed for Windows 95, 98, NT, 2000, XP, Vista and Windows 7, 8 and 10. Function prototypes and LIB files are included in the package to support Microsoft C/C++ compilers. Declaration files are included to facilitate programming with Microsoft Visual Basic or Microsoft Access.
Go Back to Key Features
The following table lists all of the @Air functions currently available.
|Function(Input Arguments)||Output Value|
|AirPVWT(P,V,W,unit)||Dry Bulb Temperature|
|AirPTW(P,T,unit)||Saturated Humidity Ratio|
|AirPWD(P,W,unit)||Dew Point Temperature|
|AirPTWB(P,T,W,unit)||Wet Bulb Temperature|
|AirPBWT(P,B,W,unit)||Dry Bulb Temperature|
|AirPBRT(P,B,R,unit)||Dry Bulb Temperature|
|AirPTWU(P,T,W,unit)||Degree of Saturation|
|AirPWHT(P,W,H,unit)||Dry Bulb Temperature|
|AirPHWT(P,H,W,unit)||Dry Bulb Temperature|
|AirPHTs(P,H,unit)||Saturated Dry Bulb Temperature|
|AirPWST(P,W,S,unit)||Dry Bulb Temperature|
|AirPSWT(P,S,W,units)||Dry Bulb Temperature|
|AirVapPT(Pvap,unit)||Saturation Temperature of Water|
|AirVapTP(T,unit)||Saturation Pressure of Water|
|AirCondPTH(P,T,unit)||Enthalpy of Compressed Liquid Water|
|AirCondPTS(P,T,unit)||Entropy of Compressed Liquid Water|
|AirWX(W)||Mole or mass fraction|
|AirVer()||Version and serial number|
The UnitSet argument is used to select the unit set, formulations and other calculation options.
When calling the functions from 1-2-3, the function name is preceded by the "@" character, eg. @AirPTWH(P,T,W,unit) for 1-2-3
If you wish to try @Air, you may download a fully functioning copy for a 30 day evaluation period. You may also use this download as a replacement for a lost or damaged copy of @Air 4.0. If you decide to purchase @Air you may use the download and we will provide you with a serial number for permanent use. Go to our Order page when you are ready to purchase @Air.