The software provides such simulation capabilities as time steps of less than an hour, multizone airflow, thermal comfort, and photovoltaic systems. According to DOE, the new version includes a number of enhancements including additional input and output options, simplified definitions of HVAC systems, and speed improvements.

EnergyPlus is available for Windows 95/98/ME/NT/2000/XP and Linux. The software is offered for free download at DOE's Web site.

For more information, visit www.eere.energy.gov/buildings/energyplus.

Publication date: 05/23/2005