TRACE™ 700

As a systems and services provider, we understand the challenges of designing the most efficient, lowest cost HVAC system solution. That’s why we developed Trane Air Conditioning Economics, or TRACE™—a design-and-analysis software program that helps HVAC professionals optimize the design of a building’s heating, ventilating and air-conditioning system based on energy utilization and life-cycle cost.

TRACE 700 helps you compare the energy and economic impact of building-related selections such as architectural features, HVAC systems, HVAC equipment, building utilization or scheduling, and financial options.

Compared with other economic analysis software, TRACE advantages include:

Extensive Modeling Functionality

Choose from over 50 airside systems, air- and waterside economizers, advanced chiller plant configurations, water-source and central and distributed ground-source systems, VRF and UFAD systems, dedicated outdoor-air systems and optimized control strategies. View details...

Integration

ASHRAE Standard 90.1 equipment and envelope libraries, gbXML (green build XML) imports, weather files, templates, ASHRAE 62.1-2010 Ventilation Rate Procedure, Building Information Modeling (BIM) and more. View details...

Compliance

TRACE 700 complies with Appendix G for Performance Rating Method of ASHRAE Standard 90.1-2007 for LEED analysis, and was the first simulation software approved by the IRS for energy-savings certification (EPAct). TRACE is also tested in compliance with ANSI/ASHRAE Standard 140–2007. View details...

Support and Training

World-class dedicated engineers and support specialists are available to answer your questions and help you discover the best solution for your HVAC design. TRACE 700 customers can also attend our training classes

The LEED modeling process can be tedious and time consuming. The latest version of TRACE simplifies the building energy modeling process for LEED projects.

What’s New in TRACE 6.3

  • LEED Guide walks users through each input screen and offers examples for thorough understanding

  • Complete set of ASHRAE 90.1-2007 construction types, systems, and equipment

  • Baseline Building Creator according to ASHRAE 90.1-2007 Appendix G including automatic 90.1 minimally compliant construction input, proportional window reduction and automatic ventilation matching

  • Updated library members with variable speed eFlex compressors and Trane Advantage™ VRF equipment
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The latest version of TRACE simplifies the building energy modeling process for LEED projects.

 

 

As the Leadership in Energy and Environmental Design (LEED®) rating system evolves, achieving LEED certification continues to require the most current tools to help maximize credit points. TRACE 700 is continuously being updated to reflect the most recent changes in energy standards, and it meets the requirements for simulation software set by ASHRAE Standard 90.1-2004/2007 and the LEED Green Building Rating System. The software is supported by the TRACE C.D.S. team, the majority of whom are LEED APs.

Specifically, TRACE 700 can help document compliance with ASHRAE Standard 90.1 or validate the building’s eligibility for LEED certification. TRACE 700 provides multiple features to help model the Performance Rating Method:

  • LEED Guide (view demo)
  • Baseline Building Creator
  • Rotate building automatically
  • Reset hot-water-leaving temperatures
  • ASHRAE Standard 90.1-2004 and 2007 compliant equipment library
  • Automatically resize fans
  • Simulate daylighting
  • Estimate cooling coil condensate
  • Calculate ASHRAE 62.1 with DCV based on CO2
  • Reset supply-air temperatures
  • Model extensive air-to-air energy recovery options
  • Detailed output reports for LEED submission
  • Packaged energy rate break-out

 

LEED credits

TRACE 700 helps to achieve Energy and Atmosphere prerequisite 2 and gain credit points under Energy and Atmosphere credit 1, but there are other credit points TRACE 700 can help attain. Four additional credits lend themselves to the modeling capabilities of TRACE 700.

  • Water Efficiency credit 3
    The Equipment Energy Consumption report shows the amount of make-up water associated with the cooling coil condensate. This information may be helpful in achieving this credit.
  • Energy and Atmosphere credit 5, option D: Measurement & Verification.
    The model used for EAc1 can be used towards achieving this credit. Reference the “International Performance Measurement & Verification Protocol: Concepts and Options for Determining Energy Savings in New Construction Volume III” for detailed information on how to appropriately adjust the model from EAc1 to be used for this credit.
  • Energy and Atmosphere credit 6: Green Power
    The model used for EAc1 can identify the baseline to achieve Green Power credits.
  • Environmental Quality credit 8: Daylighting & Views Credits are awarded when a specified level of daylighting is achieved. When users create daylighting definitions within TRACE, the program generates a special report showing the foot-candles of daylight present in the spaces with daylighting controls.

Release notes

Release 6.3

Release 6.2

[Version 6.3.0] 9/6/2013

This update contains the following items:

  • Added LEED Guide, a step-by-step guide on modeling for LEED V3.
  • Added baseline building creator, a one-step process for building a minimally compliant building, according to Appendix G 90.1-2007.
  • Added ASHRAE 90.1-2007 Appendix G baseline systems. (Systems 1-8)
  • Added IPAK Standard and High-Efficiency Air-Cooled Unitary library members.
  • Added IPAK Variable-Speed eFlex Air-Cooled Unitary library members.
  • Added Trane VRF Heat Pump and Heat Recovery units.
  • Added Walls by Cardinal Directions report.
  • Added full load rates for accessories on the Equipment Energy Consumption report.


  • Updated LEED report - Lighting (w/Sq Ft) broken down by space type; base utilites broken out in Section 1.6; updated headings to align with LEED v3.
  • Updated Metric load rates in customized settings.
  • Updated rate structure to allow negative values.
  • Updated the 62.1 report to show all zone Vot when a zone level coil is present.
  • Updated Fan Coil systems to be calculated using ASHRAE 90.1-2007, Appendix G, system 1 when used in a baseline system with PRM Calc turned on.
  • Updated the adjacent building shading algorithm for the Southern hemisphere.
  • Updated the RTS calculation method (radiant fraction).
  • Updated the TRACE 700 weather import to allow expanded .epw weather files.
  • Updated the optimum start calculation.


  • Fixed RTS table lookup load methodology when %glass = 100.
  • Fixed Schedule Editors so no overlap of time is allowed.
  • Fixed hot gas reheat calculation; the proportion of ambient was not correct.
  • Fixed an error in the ASHRAE 62.1 calculation that allowed the VAV min to fall below Vbz/Ez.
  • Fixed the PRM fan report to allow Fan Coil systems to be displayed.
  • Fixed the Library input value report for heating design.
  • Fixed an error in the code for UFAD systems when adjacent floors are used.
  • Fixed an error in air-to-air energy transfer devices that used bypass dampers. Static pressure of the ERD was still being applied.
  • Fixed a reporting error for the Bypass Variable Reheat system; the heating mode CFM was incorrect.
  • Fixed an error in the Displacement Ventilation system with Room Induction; the time of capacity peak was incorrect.
  • Fixed an error when room exhaust was entered as 100%.
  • Fixed an error with Displacement Ventilation when an Aux cooling coil was added.
  • Fixed the Auxiliary losses to plenum; incorrect air temperature to plenum.
  • Fixed the weather override "standard" default; it was not properly converting to metric units.
  • Fixed the cooling airflow for Rooftop Multizone system.
  • Fixed an error in the cooling coil peak when both retest peaks was turned off and main coil capacity was equal to "% design minus aux capacity".
  • Fixed a GUI issue associated with the generate button for ambient modification curves.
  • Fixed a reporting error on the system component selection report, Primary fan %OA.
  • Fixed the chilled beam sizing when "% of ventilation and room latent" was selected for the aux coil capacity.
  • Fixed the Plant Wizard-Ice storage thermal storage multipliers.
  • Fixed an error for free-cooling plate-and-frame heat exchanger where both the condenser pump and free cooling pump were operating at the same time.
  • Fixed an error that was causing incorrect results when a heating only system was added to a system with supply air temperature reset.
  • Fixed the design cooling capacity reports to show aux capacity.
  • Fixed an error that incorrectly divided the energy rate for fluid coolers by the number of cells entered on the heat rejection library.
  • Fixed an error in the heating coil oversizing for constant volume systems.


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[Version 6.2.10] 2/28/2013
This update contains the following items:

  • Added "Close ventilation dampers during unoccupied hours" to the Project Input Values report
  • Updated the TRACE calculation to prompt a Fatal Error when 2+ ground loops are present on the same alternative.
  • Updated the SZVAV control to be more accurate in the dead band.
  • Fixed an issue where lighting and miscellaneous loads were being counted as "unconditioned" because the heating coil capacity was zero.
  • Fixed the system component selection report to accurately display the number of VAV boxes in a Single Zone VAV system.
  • Fixed an error where ERD's were not being accounted for at design.
  • Fixed an error when the ambient relief curve was input using SI units.
  • Fixed a control error in the DCV control.
  • Fixed the UFAD economizer control. The economizer control point was not taking the underfloor heat pickup into account and therefore not running the economizer enough.
  • Fixed the LEED report for thermal storage. The LEED report was not correctly displaying thermal storage.
  • Fixed the optional ventilation coil sizing when the Heating Coil was set to zero.
  • Fixed the heat rejection type for the VRV condensing unit.
  • Fixed the building areas report incorrectly showing Glass % instead of Skylight %.
  • Fixed the energy type on the LEED report for purchased hot water.
  • Fixed the ERD leaving temperature which was sending too high a temperature to the preheat coil.
  • Fixed the primary chilled water pump for VS WSHP.
  • Fixed the holiday day type in the visualizer; it was not being displayed.
  • Fixed the cogen curves when they were entered as KW/MBH. Incorrect conversion.
  • Fixed the fan energy calculation when: ERD = room exhaust, rotate and average was selected, and no PRM calculation was selected.
  • Fixed the heating mode ventilation % when both system block airflow and system ventilation override were selected.
  • Fixed the gbXML import for slab on grade.
  • Fixed the diffuser outflow on the airflow balance report.
  • Fixed the fan sizing calculation when static pressure equaled zero.
  • Fixed the LEED report when zone and floor multipliers were used. The W/SqFt output was not correct.
  • Fixed the LEED report for KW Demand on WSHP systems.
  • Fixed the Air to Air Heat Pump curves.
  • Fixed the "Save As" feature that would crash when the user hit "Cancel".
  • Fixed the ECB report to include the cogen miscellaneous equipment.
  • Fixed the % load to return air. It would not allow 100% load to return air.
  • Fixed the cooling tower wetbulb reset. The control would occasionally ignore the wet bulb reset.
  • Fixed the ventilation reset that underestimated the amount of reset possible.
  • Fixed the parasitic energy consumption being greater than zero when the economizer was running.
  • Fixed the 90.1 PRM Calculation; it now includes input for non-primary fan static adjustments.
  • Fixed the return air calculation when upstream leakage fraction was selected.
  • Fixed the main heating coil capacity override.

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[Version 6.2.9] 10/3/2012
This update contains the following items:

  • Added kWh/Ton-hr metric to the economic summary report. This measures the plant's overall energy efficiency.
  • Added 90.1-2010 library members.
  • Added a diagnostic error message to display when a WSHP loop is missing thermal storage

  • Updated both evaporative and dry fluid cooler calculations. The updates are based on EnergyPlus algorithms.
  • Updated 90.1-2010 Heat Pump library members to comply with IC 90.1-2007-09 of ANSI/ASHRAE/IESNA (Operation between 40F-17F).
  • Updated the default cooling tower throttling value. Changed from 5F to 0.5F.
  • Updated the cooling equipment tab to allow a condenser water pump for each chiller when a plant level cooling tower is applied.

  • Fixed the economizer control point for SZVAV. It was incorrectly setting the control point too low, causing excess ventilation during the winter months.
  • Fixed the duplicate entries in the LEED summary report.
  • Fixed an error in the secondary fan design heating airflow. This occurred when a fan-powered system type was specified, but some VAV boxes were turned to "Shutoff VAV".
  • Fixed the chilled water pump(s) incorrectly staying off when the lead chiller is scheduled off but the remaining chillers are scheduled available during an hour when Thermal Storage has met the entire cooling load.
  • Fixed the export gbXML output on the file drop-down menu.
  • Fixed a "divide by zero" error in the visualizer that was causing the "Bldg Elec Monthly Energy Costs by Equip" to go to infinity.
  • Fixed the "plants" entered values report which was incorrectly displaying pump power.
  • Fixed a reporting error on the system component selection report that was missing the main heating coil for PFPVAVMBO.
  • Fixed an operational change that occurred in version 6.2.8.3. The heating airflow is now allowed to go higher, but not more than the heating VAV max airflow, and the fan will cycle higher as a result.
  • Fixed an error in linking the airside coil capacities to the plant capacity.
  • Fixed a reporting error on the room checksum report. The main heating coil was inadvertently adding the reheat coil capacity to the main heating capacity.
  • Fixed a calculation error in the VRH system. The system was not maintaining drift point control during unoccupied hours.
  • Fixed the ducted return air temperature in a BPVAV system that was causing excess exhaust heat load.
  • Fixed the ventilation load on the system checksum report to reflect the use of ERDs.
  • Fixed the 62.1 Ep value for VAV systems. When a hybrid (shut-off + Fan powered) system was created, the 62.1 report was not updating the shut-off VAV Ep values.
  • Fixed the Er value for PFPVAVMBO systems in the 62.1 report. The default was changed from 0% to 30%.
  • Fixed the UFAD system design cooling coil leaving temperature.
  • Fixed the plant chilled water pump sizing to correctly use the chilled water evaporator leaving temperature when W/gpm is selected.
  • Fixed the system component selection report to properly report the amount of secondary fans and shut off VAV boxes in the system.
  • Fixed system types VAVBB Skin heating and VAV Forced flow skin heating to have reheat coils.
  • Fixed the reporting of miscellaneous pump energy in the LEED report.
  • Fixed ERD control with frost prevention to decrease gas usage.


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[Version 6.2.8] 3/30/2012
This update contains the following items:

  • Added a new Single Zone VAV (SZVAV) System.
  • Added the ability to simulate a dual VAV cooling/heating minimum feature for all systems that use reheat minimum to control the cold deck airflow at minimum load.
  • Added five Mexican weather libraries with the origin filetype appended to the name.
  • Added the ability to export a COMNET XML file for LEED submission on the COMNET website.
  • Added VAV IntelliPak and Voyager rooftops in the cooling equipment library.
  • Added the ability to view the LEED Summary Report if the economics portion is not calculated.
  • Added two new air cooled chiller/ice storage templates for the Plant Wizard.
  • Changed conversion for ft. of water in Rate Structure Library.
  • Changed the LEED Summary Report to not show the optional ventilation fan if the fan type, flow rate, or static pressure is not selected.
  • Changed the Utility Rates Library to allow six significant digits after decimal.
  • Fixed an error that did not let the user change the U-factor of a copied door.
  • Fixed an error that reported excessive tower makeup water in the WSHP loop.
  • Fixed an error that prevented the cooling tower unloading curve to unload correctly when using kW units.
  • Fixed an error that incorrectly calculated the dry cooler energy consumption when set as a heat rejection device.
  • Fixed an error that did not account for skylight load in duplicate rooms per zone.
  • Fixed an error that did not account for the main heating coil when an auxiliary coil was added and the coil capacity was modified.
  • Fixed an error that prevented the psychrometric report airflow to match with the checksum report airflow when Standard 62.1 was applied in the system.
  • Fixed an error that did not account for the shutoff mode in fan powered VAV system.
  • Fixed an error that did not consider the room humidity ratio from psychrometrics when calculating ventilation latent load in a few circumstances.
  • Fixed an error that did not include the ventilation load when sizing a radiation heating coil if a preheat coil did not exist and ventilation deck was something other than Room Direct.
  • Fixed an error for Mexican weather files due to unit conversion error that presented very low humidity ratio values.
  • Fixed an error that duplicated the ventilation when ventilation units were %Clg Airflow and the cooling supply airflow was entered in cfm units.
  • Fixed an error where fan cycling was only partially turning down the fan for mixing systems.
  • Fixed an error that defaulted to the library pump flow rate value when the hot water pump rate was entered as zero. User must select “none” in the pump field.
  • Fixed an error in the Visualizer that did not reduce the electric demand when lighting demand was unselected from the graphs.
  • Fixed an error that under-reported heating loads when VAV system preheat coils were manually undersized.
  • Fixed an error where units of Hp and kW/cfm were not being converted correctly.
  • Fixed an error that did not use the Vertical bore imported by the user.
  • Fixed an error that incorrectly sized the chiller when only a base utility was assigned to it.
  • Fixed an error that calculated incorrect energy consumption when a dry cooler was selected as a heat rejection device and a fluid cooler was selected as a free cooling device.
  • Fixed an error that did not show the cooling tower heat rejection in the geothermal summary report.
  • Fixed schedule graphs that were not graphing correctly.


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[Version 6.2.7] 7/8/2011

This update contains the following items:

  • Added the ability to import epw weather files.
  • Added two new room types.
  • Added the ability to enter negative numbers for the LEED Fan Power Adjustment value.
  • Added ventilation library members to increase the ventilation CFM by 30% over the minimum ASHRAE 62.1 to gain the credit for LEED IEQ Credit 2.
  • Updated the Environmental impact information.
  • Added geothermal library members.
  • Expanded the cogen library to include two new members.
  • Added the ability to modify system profiles.
  • Fixed an error preventing the copying of glass with no dimensions or percent in the file wizard.
  • Fixed an error that incorrectly changed the block load on a VRF system between the design and simulation phases of the program.
  • Fixed an error that incorrectly reported too much backup heating on geothermal systems with variable volume chilled water pumps.
  • Fixed an error that prevented the internal shading parameters from being shown on alt 2.
  • Fixed an error that prevented an energy recovery wheel from operating when the main supply cfm is specified.
  • Fixed an error that prevented Trace from using more than one boiler when the "link airside coil capacities.
  • Fixed an error where adjacent floor plenums caused the space load to peak in odd months when retest peaks flag was set.
  • Fixed an error that would crash Trace when condenser water reset was selected and building rotation was enabled.
  • Fixed an error that caused UFAD systems to generate huge supply airflows when Std.62.1 flag was set and retest peaks flag was set.
  • Fixed an error that resulted in the chilled water pump energy to be doubled when multiple chillers are attached to the same plant.
  • Fixed an error where Trace was using the design dry bulb temperature instead of the ground temperature for the partition delta T.
  • Fixed an error that caused excessive heating on sfpvav systems when using the "Supply Air Reset Per Worst Case Room" with the "Use system default outside air reset" checked off.
  • Fixed an error that prevented a VRF system from rejecting heat to purchased chilled water instead of a condenser.
  • Fixed an error that caused the VAV reheat minimums to be too high when the system is oversized with respect to the sum of the peak airflows.
  • Fixed an error that prevented the main cooling coil from being turned off for two pipe system configurations.
  • Fixed an error that resulted in two small of makeup water values in direct evaporative systems.
  • Fixed an error that resulted in the number of people being multiplied by 100 when the 62.1 diversity field was left blank.
  • Fixed a reporting error that displayed the wrong system type on the ASHRAE 62.1 report when a VAV system with baseboard heat was selected.
  • Fixed an error that cased the design airflows in the PRM alternative to be incorrect if Packaged EER or Packaged COP were selected.
  • Corrected the condensate return pump energy units.
  • Corrected the U-value for an external door.


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[Version 6.2.6.5] 10/05/2010

  • Fixed an issue where the auxiliary heating equipment is not being used when condenser loop temperatures drop below their minimum.
  • Fixed an energy value issue that reduced the energy usage on the LEED Summary report by a factor of 1000.
  • Fixed an issue that omitted the usage of purchased steam on the LEED Summary report.
  • Fixed an issue that displayed the averaged unmet hours for the baseline alternative rather than the zero-degree rotation on the LEED Summary report.
  • Fixed an issue that added the geothermal pump power to the auxiliary cooling and heating energy usage on the Energy Summary report.
  • Fixed a problem that caused unmet hours when using VRV/VRF airside systems and blank VAV minimums.


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[Version 6.2.6] 9/1/2010

This update contains the following items:

The Fuel Source and Reject Condenser Heat to Reference Type fields have been updated to Heating Plant and Heat Rejection Equipment, respectively for:

  • Air to Air Heat Pump
  • Air to Air HP w/ Demand Defrost
  • VRF Heat Pump
  • VRF Heat Pump (digital scroll)
  • VRF Heat Pump (Variable Speed Compressor)
  • Default Water Source HP
  • Ground Source HP – High Effic
  • Ground Source HP – Reg Effic
  • Water Source HP – High Effic
  • Water Source HP – Reg Effic

  • Added Close Ventilation Dampers during unoccupied hours option to Change Energy Parameters.
  • Added compressor energy breakout options for unitary equipment to allow for packaged energy rates to be entered without manual separation.
  • Added the LEED Summary report for use with LEED submission documents.
  • Added the LEED Settings dialog box to configure the LEED report.
  • Added numerous potential errors related to the ASHRAE 90.1 Appendix G/LEED Process to Scan for Errors.
  • Added the ability to model heat recovery VRF systems and two default VRF heat recovery plants.
  • Added the PRM Fan Details report to show calculated factors for determining fan power and power distribution among fans for Appendix G.
  • Added Supply Air Reset Temperature offset to the Component and Project Tree views.
  • Added several space types per ASHRAE 62.1-2010 for ventilation calculations.
  • Archived legacy VRF heat pump and VRF cooling only plants.
  • Moved Energy Source from the Controls section to the Cooling Equipment screen.
  • Moved Reject Condenser Heat from the Controls section to the Cooling Equipment screen.
  • Moved Reject Heat to Plant from the Controls section to the Cooling Equipment screen.
  • Removed options to view archived or T600-named library entries.
  • Removed the PFPVAV system in favor of the PFPVAVMBO system.
  • Increased the number of rooms that can be simulated with daylighting from 1000 to 3000.
  • Increased the number of significant digits on the Economic Parameters report.
  • Numerous updates for the Bidirectional Cascade flow scheme when modeling a central geothermal system.
  • Altered the Walls by Direction report to include unusual orientations in a more straight-forward manner.
  • Changed the default U-value for internal shading type Sample from 0.07 to 0.70.
  • Fixed an error that prevented combining files correctly when parenthesis are being used in the names of the spaces.
  • Fixed an error that incorrectly displayed the ventilation quantities when using a ducted, plenum or plenum/corridor vent deck.
  • Fixed an issue that prevented the GLHE temperature from surpassing the design condenser entering or going below the design minimum temperature.
  • Fixed an error that didn't properly show the fan power on the ECB/PRM Summary report when using custom fan curve units.
  • Fixed an error that prevented certain types of shading from operating in the southern hemisphere.
  • Fixed an error that prevented the Plants Entered Values reports from being displayed.
  • Fixed an error that incorrectly assigned ventilation load to main coils when using specific dedicated OA systems in the design simulation.
  • Fixed an error that prevented the design chilled water temperature from being copied from the library to the Controls screen.
  • Corrected an error that doubled the oversizing for individual equipment on the Equipment Energy Consumption report when Link Airside Coil Capacities was enabled.
  • Fixed the Room Entered Values reports to correctly shown when CO2 DCV sensors are being used.
  • Fixed the Systems Entered values reports to correctly show the Space Convective Gains to Occupied Layer.
  • Fixed an error where Chiller Tower Optimization was not properly used with respect to the chiller.
  • Fixed an error that incorrectly calculated cooling tower make-up water when using gpm or lps.
  • Fixed an error that increased the FL rate in heat recovery mode for a heat pump by 12.
  • Fixed the DHW condenser heat recovery system when using Reject Cond Heat = Domestic Hot Water.


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[Version 6.2.5] 3/22/2010

This update contains the following items:

  • Numerous calculation speed enhancements.
  • Added default closed-circuit cooling towers based upon ASHRAE 90.1-2007 equipment performance.
  • Removed variable volume fan Z-factor calculations from all variable volume fans.



  • Fan Curve 1 was changed to more closely approximate a forward curved fan.
  • Fan Curve 3 was changed to more closely approximate a forward curved with discharge dampers.
  • Fan Curve 9 was changed to more closely approximate the usage of a VFD
  • CZR-VFD set to be a standard library member.
  • Fan Curve 7 was archived.
  • Fan Curve 8 was archived.
  • Critical Zone Reset was archived.
  • EQ4280CZ was archived.
  • EQ4223CZ was archived.



  • BI fan w/inlet vn (Eq4204) curve changed from Fan Curve On/Off to Fan Curve 2.
  • AF Centrifugal var freq drv (Eq4280) curve changed to use the new Fan Curve 9.
  • BI Centrifugal var spd mtr (Eq4239) curve changed to use the new Fan Curve 9.
  • FC Centrifugal vav/inlet vn (Eq4203) set to be a standard library member.
  • FC w/VFD Crit Zn Reset (EQ4223CZR) set to be a standard library member.
  • AF w/VFD Crit Zn Reset (EQ4280CZR) set to be a standard library member.
  • Axial fan with VFD (EQ4202) set to be a standard library member.
  • AF w/IV Crit Zone Reset (Eq4201) was archived.
  • AF w/VFD Crit Zone Reset (Eq4280) was archived.
  • FC w/IV Crit Zone Reset (Eq4203) was archived.
  • FC w/VFD Crit Zone Reset (Eq4223) was archived.


  • Changed all critical zone reset fan curves to follow a cubic relationship.
  • Changed the unmet hours calculation so that only unmet hours in the zero degree rotation are used for the baseline alternative.
  • Changed the reporting of door areas in the Checksum reports to match that of window area reporting.
  • Added ability to model Trane's Bidirectional Cascade system.
  • Added ability to simulate a horizontal wellfield using IGSHPA calculations.
  • Added ability to simulate a vertical wellfield using an imported IDF file from a wellfield design program.
  • Added ability to simulate a custom wellfield by creating a custom Geothermal Schedule.
  • Added ability to create custom chilled water reset curves in the Curves Library.
  • Added ability to create custom condenser water reset curves in the Curves Library.
  • Added a Flow Scheme option to switch between traditional Fully Mixed ground loop calculations and Bidirectional Cascade.
  • Added new RTWD equipment for Bidirectional Cascade operations.
  • Added new thermal storage types to simulate various ground loop heat exchangers.
  • Added the ability to use ASHRAE 90.1-2007 PRM fan power calculations with associated pressure credits.
  • Added the ability to enable ASHRAE 90.1-2007 PRM calculations and disable building rotation for analysis purposes.
  • Added units of watts per gpm for chilled water and condenser water pump types.
  • Added two additional output reports for geothermal systems: Geothermal Summary and Geothermal Plant Load Summary.
  • Added additional fields to the TRACE Visualizer (Graph Profiles and Energy) for cogeneration and geothermal selections.
  • Added the ability to specify the file location for an imported weather file in the Weather Library.
  • Added functionality that will create templates based upon the Space Type Name when importing gbXML.
  • Disabled direct dehumidification during unoccupied hours.
  • Fixed an error that would eliminate baseline fan power when unconditioned spaces were assigned to a baseline system.
  • Fixed an error that would not display some energy usage when a heat pump airside system was used on the Equipment Energy Consumption report.
  • Fixed an error that prevented load shedding economizers to work properly.
  • Fixed an error that would not account for negative base utilities on the ECB report.
  • Fixed an error that would hide the heating ventilation quantity for some systems on the Room Checksums report.
  • Fixed an error that would account for adjacent floor loads twice when using multiple adjacent floors.
  • Fixed an error that incorrectly displayed the heating sensible coil load on the Peak Load reports.
  • Fixed an error that created large amounts of over/undersizing when using ASHRAE Standard 62.1 and Room Direct ventilation decks.
  • Fixed an error that incorrectly reported room ventilation quantities when using SFPVAV and ASHRAE Standard 62.1.
  • Fixed an error that incorrectly calculated the PFPVAV system exhaust quantity during heating design.
  • Fixed an error that would oversize boilers when absorption chillers were used in conjunction with cogeneration equipment.
  • Fixed an error that would prevent energy values to be calculated when the calendar definitions contained fewer than five daytypes.
  • Fixed a skylight load error that would incorrectly read legacy values and not report the correct skylight loads.
  • Fixed two errors that would ignore the capacity of a humidification coil during the system simulation.
  • Fixed an error that incorrectly ratioed reduced year weather when derived from full year weather.
  • Fixed an error that would ignore the Ez value in ASHRAE 62.1 calculations when Vot was less than Vou.
  • Fixed an error in the Economic Summary report that would not display fuel sources other than electric in the graphs.
  • Fixed an error that prevented custom doors from being exported and imported via EXP files.
  • Fixed an error that would hide the reheat coil when using the PFPVAVMBO system type.


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[Version 6.2.4] 10/23/2009

This update contains the following items:

  • Added "% of Design Capacity by adjusting airflow" as an option on the Coils tab of Create Systems.
  • Added "% of Design Capacity by allowing subcool" as an option on the Coils tab of Create Systems.
  • Added the ability to export basic Load Design data to HVAC Solutions software.
  • Added license activation to software installation.
  • Changed "% of Design Capacity Cooling Capacity" to only adjust the latent coil capacity and not airflows.
  • Changed the default Main cooling coil capacity units to be "% of Design Capacity by adjusting airflow" for new projects.
  • Changed the default Main cooling coil capacity units to be "% of Design Capacity by adjusting airflow" for legacy projects.
  • Changed the Report Viewer scrolling progress bar to display in the background.
  • Updated the Equipment Energy Consumption report to show heating energy usage for a heatpump cooling plant.
  • Updated several system images with additional labeling.
  • Updated the Economic Summary report to include more graphs but similar economic information.
  • Fixed several errors displaying economic values with large files.
  • Fixed an error displaying equipment energy consumption with SI units on the Equipment Energy Consumption report.
  • Fixed a demand limiting error.
  • Fixed an error that would not use direct dehumidification weather correctly.
  • Fixed an error that would display the wrong airflow on the Checksum reports with shut-off VAV boxes and SFPVAV systems.
  • Fixed an error that prevented hot gas reheat for dehumidification from working properly with dedicated outside air systems.
  • Fixed an error that incorrectly calculated Voz when ASHRAE 62.1 was being used for system level ventilation calculations.
  • Fixed an error that incorrectly calculated auxiliary heating coil conduction loads with systems that contain underfloor plenums.
  • Fixed an error that would double-account adjacent floor loads during the System Simulation.


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[Version 6.2.3] 9/2/2009

This update contains the following items:

  • Fixed an error that prevented full year weather files to be imported into Windows Vista in certain circumstances.
  • Fixed an issue that would crash TRACE on the Walls tab of Create Rooms.
  • Fixed a crash that would occur when using the Heating Building Envelope Loads at time of space peak.
  • Adjusted the deck locations for certain configurations of the Type III Isotherm Wheel.
  • Fixed an error with Available 100% as the optimum start schedule during specific levels of occupancy.
  • Fixed an error that would prevent the Design Cooling Capacities report from being displayed.
  • Fixed an error that would incorrectly display fan power when heating-only systems were used in conjunction with PRM calculations.
  • Fixed an error preventing the importing of .lds and older TRACE archive files.


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[Version 6.2.2] 7/31/2009

This update contains the following items:

  • Added the ability to use Available 100% as an optimum start schedule.
  • Added additional information to the Building Temperature Profiles report which displays when unmet load hours occur.
  • Added two additional biquadratic VRF models based upon variable speed compressors and variable flow refrigerant (digital scroll).
  • Added additional common errors to be checked when using Scan for Errors including incorrect usage of thermostat schedules.
  • Added two additional air-cooled scroll chillers.
  • Added the ability to directly import glass from LBNL Window 5.
  • Added the ability to import multiple pieces of equipment simultaneously from TOPSS.
  • Enabled the template recovery function so each project (.trc) file that is opened is scanned for template problems and fixed.
  • Fixed an error that incorrectly calculated time lag based upon thermal mass between 180 and 185 lb/sf when using the TETD method.
  • Fixed an error that did not reduce the economizer control point by the underfloor heat pickup with UFAD and DV systems.
  • Fixed an error that did not reduce the economizer control point by the extra coil leaving drybulb during indirect dehumidification.
  • Fixed an error for DDVAV where heating return airflow was incorrectly calculated when the block airflow is entered.
  • Fixed an error that displays energy usage for an alternative when that alternative's Energy Simulation was not calculated.
  • Fixed an error which allows for more combined area when using openings than the total wall area.
  • Fixed an error that incorrectly calculates daylighting when a room has an exposed floor and dimensional glass geometry.
  • Increased the total limit of chilled beams in a single room from 500 to 5000.
  • Fixed an error that would crash TRACE when a new alternative is created and the rooms are using a previous alternative.
  • Fixed an error that would incorrectly display component energy usage in the Visualizer.
  • Fixed an error that incorrectly reports ventilation quantity incorrectly with DV systems.
  • Fixed an error which incorrectly calculates the upper stratified layer temperature with DV systems and ducted returns.
  • Fixed an error that incorrectly reported auxiliary fan heat on the Airflow Heat Gain and Loss at Coil Peak report.
  • Fixed an error that would remove equipment energy usage when demand limiting was used.
  • Fixed an error that would prevent TRACE Load (.lds) files from being imported into TRACE or Load Design.
  • Fixed an error that ignored the Reset and Lockout definitions for lighting schedules.
  • Fixed an error that incorrectly calculates the return air temperature for DV/UFAD systems when a plenum return is used.
  • Updated Hot Gas Reheat for Dehumidification to be used with optional ventilation coils.
  • Fixed an error that incorrectly applied direct dehumidification with parallel supply air tempering for ACHBEAM.
  • Fixed an error that would undersize the main cooling coil design airflow with ACHBEAM.
  • Fixed an error that incorrectly reported unmet load hours with ACHBEAM.
  • Corrected the optimum start usage for SZ and VTCV systems.
  • Fixed an error that incorrectly assigned all coil capacity to the first piece of equipment when airside coils are linked to plant capacities.
  • Corrected three infiltration Heating Design definitions (Infil - Low rise office, Infil - High rise office, and Infil - Retail grocery store).
  • Fixed several Plant Wizard templates to correctly assign capacity percentages to individual equipment.


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[Version 6.2.1] 3/31/2009

This update contains the following items:

  • Added displacement ventilation airside systems.
  • Added active and passive chilled beam airside systems.
  • Added the ability to model multiple/different openings per wall including doors.
  • Added the ability to create custom door types in the Glass Library.
  • Added the ability to define rooms as conditioned or unconditioned.
  • Added additional common mistakes to check for in Scan for Errors.
  • Updated the default ASHRAE 90.1-2004 library to fix a hot water reset curve error and a PTAC energy rate error.
  • Updated the System Temperature and Humidity Profile reports to show occupied and all hours.
  • Changed the underfloor plenum location from system to zone-level.
  • Changed the default value for Space Sensible Gains to Occupied Layer from 50% to 60% for Ducted Through Underfloor Plenum and Supply Via Sidewall Displacement Ventilation options for Supply Duct/Air Path Location.
  • Changed the order of equipment displayed on the Equipment Energy Consumption report.
  • Fixed an error that incorrectly converted Height Above Ground when switching from IP to SI units.
  • Fixed an error that would remove the humidification coil when a main heating coil for the airside system (e.g. VAVBSK) did not exist.
  • Fixed an error that would prevent full year weather from being imported correctly.
  • Fixed an error that prevented the Entered Values reports from being viewed.
  • Fixed an error that prevented glass types from being imported into the Glass Library.
  • Fixed an error that eliminated the Default Air Cooled Condenser when using plant level heat rejection.
  • Fixed an error that would incorrectly calculate the coil capacity when using floor multipliers and specifying the coil capacity.
  • Fixed an error that would incorrectly calculate the stratification temperatures when adjacent ceiling plenums are used.
  • Fixed an error that would prevent the system profile from being edited in Chiller Plant Analyzer.
  • Fixed an error that would incorrectly show gas consumption on the Energy Cost Budget report for equipment with no gas consumption when Base Alternative For Energy Cost Budget Method has been selected.
  • Fixed an error that would prevent the ASHRAE weather overrides from being saved in an archive file with imported weather.


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[Version 6.2] 12/10/2008

This update contains the following items:

  • Added active and passive chilled beam systems.
  • Added constant and variable volume displacement ventilation systems.
  • Added constant and variable volume underfloor air distribution systems.
  • Added hot gas reheat for dehumidification.
  • Added ASHRAE weather from 2005 Handbook of Fundamentals.
  • Added water consumption algorithm for cooling tower to calculate water usage.
  • Added Scan for Errors feature which scans for common input errors or missing library information.
  • Added ability to input supply air leakage up- and down-stream of coil based upon system type.
  • Added ability to input biquadratic unloading curves for cooling plants.
  • Added ability to model hot water reset and condensing boilers as a function of OADB.
  • Added ability to import several chiller selections from TOPSS.
  • Added a glossary of common terms to the help file.
  • Added the ability to use reset and lockout tables for lights and miscellaneous utilization schedules.
  • Added an ASHRAE Standard 62.1-2004 output report to the Design Reports.
  • Changed the PFPVAV system to use PFPVAVMBO calculations.
  • Changed VAV minimums to 30% for: BPVAV, BPVRH, DDVAV, PFPVAV, PFPVAVRA, SFPVAV, TAB, 2FDDVV, VAV, VAVFSK, VAVBSK, VRH, VTRACRH, VTRACLC, and PFPVAVMBO.
  • Updated TRACE User's Manual with more topics including topics that discuss the new airside systems.
  • Updated system graphics.
  • Updated system graphics for the Plant Wizard and Chiller Plant Analyzer.
  • Fixed the demand defrost curves for air-to-air heat pumps to allow for proper defrost usage.
  • Fixed an issue when the exhaust fan kW would be incorrectly calculated based upon entered static pressure.
  • Fixed an issue that would not allow a preheat coil to operate with a VRH system during unoccupied hours.
  • Fixed an error that would omit the Summer Ground Reflectance when changed by a user.
  • Fixed an error that would ignore discriminator controls for some systems.
  • Fixed an error that would ignore internal shading for windows that were defined with spectral glass.
  • Fixed an error with the fan coil system that would reset room SADB based upon system-level SABD.
  • Fixed an error that would incorrectly assign the CO2 sensor location in templates based upon previous alternatives.
  • Fixed an issue with DDVAV that would incorrectly set the cold deck return outside-air CFM.
  • Fixed an issue that would eliminate chiller energy usage with heat recovery machines and tank charging.
  • Fixed an error that would double the multiplier used to link plant and coil capacities.
  • Fixed an error that would ignore a split dehumidification system with a single zone airside system.
  • Fixed an error that would ignore the use of energy recovery with the radiation heating-only system.
  • Fixed an error that displayed the incorrect units for a humidification coil on various Design reports.


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Trane, in offering the Trane Air Conditioning Economics (TRACE™ 700) computer program, accepts no responsibility or liability for the design of buildings or their support systems or for the accuracy of the economic analysis and the building and system air conditioning load data. The economic analysis and the building and system air conditioning load data are based on conventional economic and engineering principles, plus financial and engineering data supplied only by the program user. This TRACE 700 program is intended to be used as a comparative study of operating efficiencies and costs of alternative air conditioning systems. Trane further accepts no responsibility or liability for the suitability of the building air conditioning system in providing proper temperature control, humidity control, infiltration, air distribution and quiet operation.

To install and run the program you will need: a Pentium® 4 or higher processor, Microsoft Windows® 7/8 operating system, at least 1 gigabyte (GB) of RAM,  and 500 MB of free hard-disk space (750 if Microsoft .NET Framework version 2.0 is not already installed).