Keep It Simple & Solid
A Note on Excel Programs Containing Macros
Most of the programs available with HVAC Simplified (ASHRAE, 2006) and from the geokiss.com website contain MS Visual Basic macros to perform the more complex calculations. Since macros from unfamiliar sources may contain viruses, the default MS Excel security level is set at "High". For Office 2003 and earlier products, the user must set the security level to "Medium" or "Low" for the programs to operate. In some networks, resetting the security levels must be performed by the Network Manger.
To reset the security level for Excel 2003 and earlier versions,
For 2007 Office products, the terminology "trust" has replaced "security" and the procedure has been changed (as you might expect). To change the "trust" settings: