Ener-Win Energy Simulation Software for Buildings              


3D viewing feature in Version 10

© Degelman Engineering Group, Inc.

(updated: 5 August 2019)



NOTE: This software is supported on

Microsoft Windows 10® and Office® 3016 and 365.

Microsoft Excel® is an integral

feature that shows tabular results,

allowing for creation of bar charts

and graphs of energy consumption.


Software support is provided via email to:






                                                                             Pro Edition! (Version upgrade 10.8)  


Some new things in Enerwin-10 Pro:       


  1. Expanded list of 24-hour user profile categories for use by each building type.

  2. Automatic "Window Sizer" and overhang shade feature added (see Update History List for June 6 below.)

  3. Weather data base upgraded to 4700+ cities and covering 8 different regions for easier look-up.  This will be updated again in 2020 when the WMO (World Meteorological Organization) publishes it new 30-year climate norms data.

  4. Updated the energy efficiency criteria to meet the latest Standard 90.1-2016 and Standard 189.1-2017 for Green Building Designs.  These will be updated again in the year 2020.

  5. Improvement in the appearance of the 3D imaging in the sketch package as well as some of the appearance of selection options in the main menu screen.

  6. More attractive pricing structure to make available a nominal cost for universities and other organizations to purchase multi-user site licenses with no expiration date, a lower cost single user professional license.  Students may request this:  one semester, free 5-month license for individual university-registered students (not renewable.)


PLEASE:  Report back to enerwin@suddenlink.net if you run into problems.  This is the best way to make the fixes possible.






                                         3D Viewing Tool in Version 10                                                            Try this new Windows 10 App for 2019       

                                                                                                                                                    (Available only in the Windows 10 Apps Store for $5.79)                                                   

                                                                                                       (Click image for description and user's instruction YouTube video)


..... Enerwin-10 incorporates a weather data base of 4700+ cities worldwide .....             



Price structure (all 32/64-bit versions):

(Click the icon for ordering details.  Note: Versions e9 and 2002 are no longer available.)

       Pro 10.8                                 EC 6.9a                             


 US$ 79.00 or $59.00                           Free                                   


"Precautionary Note!!  After March 2018, Registration & Passwords were changed for all versions.

If you have a previously activated license, send old license number with request for new license info."



General Note:

     Versions EC and 10 include greenhouse gas emissions calculations and

        compatibility with ASHRAE's International Weather Data Base (IWEC). 

ENER-WIN© is a Windows-based hourly energy simulation model for evaluating whole-building energy performance.  The program features an interactive graphical interface for input and output.  The simulation model uses streamlined algorithms that permit hour-by-hour energy calculations in minimal time.  The program's tabular results include monthly and annual utility energy and costs, peak HVAC loads, a thermal comfort analysis and a life-cycle cost summary.  It has a Visual Basic interface and a FORTRAN-95 simulation engine that features transient modeling based on sol-air temperature, time lag, and decrement factor; zone loads and temperatures based on a thermal balance methodology; and daylighting algorithms based on a modified Daylight Factor methodology.  The software contains default data bases populated with weather data for over 4700 cities worldwide, lighting power densities based on 40 building types in ASHRAE's energy-efficiency Standard 90.1. The latest version, Enerwin-e9 lets the user select from three different standards (90.1-2010, 90.1-2016, or the Standard 189.1-2017 for Green Buildings.)  Enerwin-EC is similar but is based mostly on U-Factor requirements from Standard 90.1-2007.  Version 10 Pro adds significant precision in selecting the default wall and roof U-factors and window solar heat gain coefficients (SHGC), in that these are now sensitive to not only the building type selected, but also the particular code selected and the climate zone represented by the selected city.  Ventilation rates, as well as occupancy densities, are based on the ASHRAE Standard 62.1 for acceptable indoor air quality.  Occupancy and other 24-hour profiles, such as lighting and hot water usage, are based on sources that have been involved in energy simulations for buildings, particularly the U.S. DOE and the COMNET (Commercial Buildings Energy Modeling Network) organization.   Enerwin-10  has three separate schedules ("Mon-Fri", "Sat", and "Sun") for each building type and for each of the usage parameters (occupancy, hot water use, lighting, receptacles "plug loads", fans and ventilation, summer thermostat settings, and winter thermostat settings.)   Versions EC and 10 include the calculation of greenhouse gas emissions caused by the building's energy consuming systems.   If gas or oil are used for on-site heating, the emissions are calculated directly from the fuel consumption.  Emissions for all electricity use are calculated at the power plant, showing values for gas-fired, oil-fired, and coal-fired generators.  Emissions are calculated in terms of tons (short or metric) of Carbon Dioxide (CO2), Sulphur Dioxide (SO2), and Nitrous Oxides (NOx).


Ener-Win Update History:

(Note:  All versions permit viewing of tabular summaries via internal link to Microsoft Excel © under MS Office © )

25 June 2019:               Upgrade to Release 10.8 expanding use profile groups from 9 to 12, which are used by the 40 different
                                            building types.  Hourly profiles include: occupancy, hot water, lighting, fans, ventilation, summer and
                                            winter thermostat settings, further divided by work days, Saturdays, and Sundays.
6 June 2019:                 Upgrade to Release 10.7 significantly reduces the efforts of data entry concerning the sizing of windows on
                                            the building's wall exposures. A new "Window Sizer" feature permits the user to simply accept the code
                                            limitations for window sizes, specified by a WWR (Window/Wall Ratio, as percentage of wall area), which is
                                            different for each of the compass points N,E,S,W. The difference in this spec for Northern and Southern
                                            Hemispheres is handled automatically in the software. Also, the green building standard 189.1-2017 has a new
                                            spec for minimum overhang shades for the 4 main exposure directions. This is handled within the drawing
                                            (sketching) routine in this Release of  Enerwin. All limitations that are imposed by the selected code can be
                                            overridden by the user.
                                            Last but not least, a new User's Manual has been written targeted specifically at the Enerwin 10.7 version. It can
                                            be downloaded at any time while you are looking at this web site.  It's name is User-Manual-V10.pdf, and the
                                            previous user's manual (User-Manual-2007.PDF) is also still available for those using the Enerwin Version EC.
8 January 2019:           Minor updates to some of the web site images for Enerwin (Rel.  10.6e+) and AET-2019. (No program changes).
1 December 2018:       Updates & fixes to allow changes in Weather Data and Building Types during projects design.  (Rel.  10.6e+)
1 November 2018:      Corrections to calculation of monthly compressor full-load operating hours and COPs.     (Rel. 10.6d)
18 October 2018:         Added the ability to include doors in the envelope properties.  Corrected several other problems. (Rel. 10.6c)
12 October 2018:         Bug fixes and Weather database modified to allow user to edit, add or delete city data files. (Rel. 10.6b)
7 September 2018:      Updates to Lighting Power Density editing features. (Rel. 10.6a)
1 September 2018:      Updates to incorporate requirements of ASHRAE Standard 189.1-2017 instead of 2014. (Rel. 10.6)
30 August 2018:          Minor updates to climate data base for Korea and code requirements for daylighting. (Rel. 10.5a)
28 August 2018:          Adjustments to resolution of drawing package to accommodate 1440 x 900 screens and larger. (Rel. 10.5)
23 August 2018:          Major modifications to drawing package and bug corrections. (Rel. 10.4)
13 August 2018:          Significant upgrades to drawing package and error corrections in the simulation algorithms. (Rel. 10.3)
2 August 2018:            Upgraded to new version (Enerwin-10), updated weather database to 4777 cities, discontinued version e9.
                                           Repaired some errors in the 3D view routine in the sketch screens.
19 March 2018:           Minor fixes to the images in the new 2018 version of the AET (Architect's Energy Tool.)
13 October 2016:        Changes to all Enerwin versions to fix problems in weather data for time zone representations.
8 October 2016:          Changes to all Enerwin versions to rectify temperature problems when displaying hourly values in Excel.
12 September 2015:   No changes to Enerwin versions, some improvements/updates made for the AET App under Windows 10.
01 May 2015:               Validation check for running Enerwin versions under Windows 10.  (no content changes.)
01 February 2015:      Bug correction upgrade to pre-detect zero profile numbers prior to execution.
15 January 2015:        Changes to licensing methodology - requiring users to reset both registration numbers and passwords.
03 December 2014:    Number of bug fixes to multiple floor zones in all three versions.
29 October 2014:        Correction to Winter thermostat profile settings in Version e9.
09 October 2014:        Added a Windows 8 (8.1) App for quick & easy building energy analyses.
05 June 2014:             Major upgrade revisions to all versions to correct the calculations for multistory buildings.
20 May  2014:              Major cleanup work performed on Version EC (Release 6.7)
21 April 2014:              Minor cleanup work performed on Version e9 (Release 9.2c)
15 April 2014:              Some cleanup work performed on Version 2002r (Release 14.04) and Version EC (Release EC 6.5a)
15 April 2013:              Error corrections to SI graphics screens, Improvement in RH calculations in zones. Release 9.2b
25 February 2013:      Upgrade on all three versions for better compatibility with Win 8, 64-bit, incl. User Account Control.
9 February 2013:        Error correction to heating fuel selection in the zone description form. Update Release number to 9.2a
18 June 2012:             Update of Enerwin-e9 to include a 3D schematic visualization feature.  Release 9.2
20 May 2012:               Release of Enerwin-e9 (the enterprise version), and a change in pricing structure.
21 April2012:                 Minor adjustments to the saving and retrieval routines for hourly output data. Release EC 6.4. 
19 January 2012:         Added 19 more cities to Viet Nam weather data base, bringing the total cities to 2032. Release EC 6.3.
29 September 2011:    Update to Release 6.2 to correct access to MS Excel for hourly data outputs.  
13 September 2011:    Update to Enerwin-EC, Rel. 6.1 to include current Microsoft runtime modules.  
8 August 2011:             Bug fixes to Enerwin-2002 to access Excel to view the tabular hourly data.  Release 11.01. 
18 June 2011:               Minor fixes to Enerwin-EC for compatibility with MAC Virtual PC.  Release 6.1. 
13 February 2011:       Update fixes to internal link to the MS Excel spreadsheet software plus a correction to
                                         the Profiles button in the Zone Description form.  This is Release 6.0. 
26 January 2011:         Beta trial for Enterprise Version e9:  (in progress) This new version will include extended
                                             and richer defaults for both ASHRAE Energy Standard 90.1-2010 and Standard 189.1 for
                                             Green Buildings.   All versions of Enerwin have been tested under both 32-bit and 64-bit
                                             Microsoft Windows 7 and 8 ®. 
27 November 2007:    Release 5.9:  Error fix for annual heating loads in Version EC.
10 August 2007:          Release 5.8.2:  Error fix for updating weather data file or adding new cities.
28 July 2007:                Updated the Ener-Win User's Manual.  Download NOW!
5 July 2007:                  Release 5.8.1:  This version tested under Microsoft Windows: Vista ®.
                                             Error corrected in ground heat transfer through floor slabs.  Added 51 countries and 542
                                             cities to the weather database -- resulting in 119 Countries and 2013 cities. [Click to see cities]
18 October 2004:        Ener-Win Version EC (Energy Compliance Tool) first introduced. 


All users can request a FREE license to Ener-Win Version EC.


ENER-WIN 10, Release  10.8

(No expiration license!  Once you purchase a full-price license, the registration key and password are operational for any new upgrades.)

Free 60-day trial period.  Download now (15 MB).

Now, three choices:

                        1.   Version 10  Pro Version (15 MB) -- Individual or multi-seat site license. 

                          ( US $79.00 site license).  Uses ASHRAE Climate Zones and Standards 90.1-2010 & 2016 or 189.1-2017. 

                          ( US $59.00 individual license.)

                          ( 5-month free trial available only to university students with valid registration.)

                           Note:  This release is not compatible with earlier Enerwin versions.  Use Windows 10.8 (preferred.)


                    2.   Version EC  energy compliance (11 MB) -- No expiration multi-seat license.  (Free).

                           Based mostly on ASHRAE Standard 90.1-2007, but allows for ignoring the energy standards.                            



       Common features in ENER-WIN versions:

  • 25 HVAC zones per floor in multistory buildings, up to maximum 98 zones total.

  • Worldwide weather database (>4700 cities) (only 2032 cities in EC version, See Cities for the Version 10.)

  • User-selected units of either SI (Metric) or Inch-Pound (British).

  • Designed for Microsoft Windows ® 10  (also compatible with Windows XP, Vista, 7 and 8.1®).

  • Windows interface to the weather data base -- easy for user to add new cities.

  • Permits user to read hourly weather data from TMY2, WYEC2, or IWEC data files in lieu of using simulated weather.

  • Permits user changes to the permanent default data base for -
    (1) HVAC system parameters, such as system COP's, fan pressures, and supply air temperatures.
    (2) Wall, roof, floor, and window thermal properties.

  • Zone editing feature -- after changing parameters in a "Zone Properties" form, you can copy ("click") these parameters globally to all other zones or selected zones.  This feature also allows window area fractions on each orientation to be applied to all rooms or selected rooms.


Sample ENER-WIN Input Screens.......

Main menu screens of

             Version 10                                       and                                      Version EC                    



Weather Data Search Screen (>4700 cities): 



A Sample Building run under Enerwin-10, showing Energy Use Index

when comparing Standards 2016 and 189.1-2014 to version 2010 *


* Image created from screen shot of Microsoft Excel © spreadsheet summaries.



Drawing Features:

(These graphics are printable or can be saved as JPEG files.)


Plan Sketch Screen (allows up to 25 zones per floor in multistory buildings) *


* Image created directly from screen shot in the Ener-Win sketch screen.



3D Visualization Views available only in Version 10 (Drawn with a single click)*

Medical Center                                                                                                     Fire Station            


* Printed JPEG Images sent directly from the Ener-Win sketch routine.



Automatic Window Sizer Screen:



Zone description form              

 (E-Z copy feature for most property parameters and window areas)



ENER-WIN Output Screen shots.......

 Annual Energy Breakdown Output Screen: 



 Monthly Utility Bills Output Screen:                                                             Peak Cooling Contributor Components:



Sample page from Tabular (printable) Reports (monthly summaries):




Download Now!!!   All programs use I-P and SI (metric) units and run under:

Microsoft Windows® 10 Preferred.

Also compatible with Windows® Vista, 7, and 8.1

& Macintosh® Virtual PC.



 ENER-WIN 10.8 © (Professional version).  Click here to download a 60-day full-featured trial copy,

                   file "Ewin-10.8-setup.zip".  WARNING: When you attempt to run the setup file, you may get the message that the file

                   is Dangerous and has been blocked.  Ignore this message and click on "More Info", then click "Run Anyway".

                   It should proceed normally. Report any problems to enerwin@suddenlink.net.   Do not attempt to copy any data files

                   from earlier versions of Enerwin to the Ewin10.8 weather subdirectory, as they will be incompatible.

                   The trial version does not require a license, but will not be renewable after the trial period ends. 

                   To renew, a regular license must be purchased.

                                       To purchase a lifetime license for ENERWIN-10, click here(NOTE: If you have paid a full license fee for Version e9,

                                       in the past, you are entitled to a free upgrade to the 10.8 Version.)   If you wish to use Enerwin-10 Pro, send an e-mail

                                        inquiry with your Enerwin-e9 registration number and password to enerwin@suddenlink.net and request the new

                                        activation number and password for Enerwin-10.8.  

                                       (US $79.00, Site license is a multi-seat license that applies to one university department or laboratory

                                        or one business organization.), or

                                       (US $59.00, Single-user professional license.)

                                       This is Release  10.8.





       ENER-WIN EC (energy compliance).  Click here to download the free version,

                    file "Ewin-EC-setup.zip".  To obtain a license for ENERWIN-EC ©, first download the software, then

                    send request to enerwin@suddenlink.net and ask for the free license.  A.S.A.P. you will be sent

                    a new registration number and password.  This is Release 6.9b.  No new updates are anticipated

                    unless error corrections are necessary.                                


                               Review Ener-Win license agreement here.




      Download most recent weather data update, weth.zip.    (See Cities)

(Do not attempt to add these cities to the Enerwin-10 weather database.  The new weather database has

been divided into 8 different directories, representing 8 different regions on earth.  The older Enerwin-e9

weather database is in a single file and can be updated with the weth.zip data.  However, there is usually

no need to update the weather database for Enerwin-10, because the 4700-city files are already in the

correct formats in their respective regions.)





ENER-WIN User Manual for version 10.  Click here to download the "FREE" user manual, file name,

         "User-Manual-V10.PDF". (Click if you need to download Acrobat® Reader in any language?). 

         This manual includes all the new features of the 10.8 version.  If you experience problems retrieving the PDF version,

         there is also a zipped version; click HERE.         






                 ENER-WIN User Manual for EC version.  Click here to download the "FREE" user manual, file name,

                   "User-Manual-2007.PDF". (Click if you need to download Acrobat® Reader in any language?). 

                   This manual includes the features of Version EC, though most of the manual is still applicable to the new Win-10

                    version.  If you experience problems retrieving the PDF version, there is also a zipped version; click HERE.



       Learn more about ENER-WIN:


For further information about Ener-Win or problems in using Ener-Win, please contact:
Larry O. Degelman, P.E.
Degelman Engineering Group, Inc.

College Station, TX 77845
or e-mail (preferred) to:

Last updated:  5 August 2019


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