• Any building geometry
• Complex construction assemblies
• Sophisticated window management
• Accurate solar shading, both for individual windows and whole buildings
• Full scheduling of loads and operations
• Daylighting availability and control    Back

Systems

Automatic or user-specified system sizing

25 basic system types, including:

• Single supply duct systems
• Air mixing systems
• Terminal unit systems
• Residential systems
• Heating-only systems
• User-designed system

Full control of air flows and temperatures at both zone and system level

User modifiable equipment efficiencies and part-load performance

Multiple schedules for components

Multiple heat sources, including gas, oil, electric and solar    Back

Plant

Automatic or user-specified plant equipment sizing

All common equipment types, including:

• Boilers
• Domestic hot water heaters
• Gas furnaces
• Terminal unit systems
• Chillers
• Cooling towers
• Pumps
• Generators
• Thermal Energy Storage
• Heat Recovery

All common energy sources, including:

• Electricity
• Fuel Oil, Diesel Oil
• Natural Gas, LPG
• Steam, Chilled Water
• Coal, Methanol, Biomass    Back

Economics

• Complete utility rate simulation capability
• Utility sell-back (for cogeneration)
• Complete life cycle cost analysis    Back

Reports

• An exhaustive set of standard output reports for all simulation features
• User-defined hourly reports    Back

New Features in DOE-2.1E

• Extensive window library
• Improved outside film conductance
• Commercial system direct / indirect evaporative coolers
• Enhanced water loop heat pump simulation including loop pumps
• Water-cooled packaged units
• Improved cooling tower simulation
• A new ECONOMICS section for estimating energy costs
• End-use summary and hourly reports
• New summary reports    Back