Building Energy Software Tools
Formerly hosted by US Dept. of Energy    


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Trane's TRACE 700 software - the latest version of Trane Air Conditioning Economics - brings the algorithms recommended by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) to the familiar Windows operating environment. Use it to assess the energy and economic impacts of building-related selections such as architectural features, comfort-system design, HVAC equipment selections, operating schedules, and financial options.

Flexible data entry, coupled with multiple views and "drag-and-drop" load assignments, simplify the modeling process and help you identify optimal zoning and plant configurations. Compare up to four alternatives for a single project by modeling various air distribution and mechanical system/control options; then assess the life-cycle cost and payback of each combination based on 8,760 hours of operation... without investing lots of extra time.

Templates provide a fast, easy way to analyze the effects of changes in building loads such as airflows, thermostat settings, occupancy, and construction. An extensive library of construction materials, equipment, and weather profiles (nearly 500 locations) enhances the speed and accuracy of your analyses. Choose from seven different ASHRAE cooling and heating methodologies, including the Exact Transfer Function.

Expertise Required: 

General knowledge of HVAC engineering principles, building geometry, and the Microsoft Windows operating system


Engineers, architects, and contractors who design and analyze commercial HVAC systems/equipment for new and existing buildings; also energy consultants and utility companies; building technology researchers; state and federal agencies; colleges and universities


Building design parameters; operating schedules; HVAC system configurations, equipment types, and control strategies; utility rates


Display, print, graph, or export any of 61 monthly/yearly summary reports and hourly analyses, including system "checksums," system component selection, psychrometric state points, peak cooling/heating loads, building envelope loads, building temperature profiles, equipment energy consumption, and ASHRAE 90.1 analysis.


Models 33 different airside systems, plus many HVAC plant configurations and control strategies, including thermal storage, cogeneration, and fan-pressure optimization, and daylighting controls. Customizable libraries and templates simplify data entry and allow greater modeling accuracy. Documentation includes detailed online Help and a printed modeling guide. Experienced HVAC engineers and support specialists provide free technical support.

United States
Major Capabilities: 
Whole Building Energy Simulation
Air Flow Simulation
Life Cycle Analysis
Building Type: 
whole building energy simulation
Free To Try
Last Software Update: 
15 October 2015
Last Entry Update: 
18 July 2018
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