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Frequently Asked Questions About 3E Plus®

Why did NAIMA develop 3E Plus®?


Click here to download
3E Plus User Guide
(2.7 Mb PDF)

Is 3E Plus® difficult to use?

Does 3E Plus® work with the Macintosh® OS?

Does 3E Plus® work with the VISTA OS and Window® 7 OS?

Why do I need to re-register for updated versions of 3E Plus?

Does 3E Plus® calculate metric measurements?

Where can I get training on 3E Plus®?

I am having trouble installing the downloaded 3E Plus® program.

How do I uninstall 3E Plus®?

Will my customized data be saved when I uninstall an older version and reinstall a newer version?

How much does 3E Plus® cost?

I'm getting a message "An error has occurred while opening job information. 13:Type mismatch" What should I do?

When installing the program I get warnings like these:

  1. an error occurred while loading material data
  2. an error occurred loading the dropdowns
  3. an error has occurred while opening job information

What should i do?

Why can't I input the thermal conductivity in SI units when adding an insulation materials to the program using the "option"features?

To access information about specific industrial insulation materials, please visit the sites listed below:

Certainteed Corp.

Industrial Insulation Group, LLC

Johns Manville

Knauf Insulation

Owens Corning

Roxul, Inc.


Q. Why did NAIMA develop 3E Plus®?

A. NAIMA developed this program to simplify the task of determining how much insulation is necessary to use less energy, reduce plant emissions and improve process efficiency.

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Q. Is 3E Plus® difficult to use?

A. NAIMA developed 3E Plus for facility managers, energy / environmental managers, industrial process engineers, and industrial plant managers. Those individuals familiar with manual calculations to determine insulation thickness, should find that the program has an intuitive interface. In addition, the National Insulation Association (NIA), has developed an accreditation program called the NIA Insulation Energy Appraisal Program, which offers a standardized approach to conducting insulation energy appraisals. This program uses 3E Plus as part of its core curriculum. NIA also has a seminar specifically on 3E Plus. For more information and to register for the NIA trainings, click here.

Click here to download the 3E Plus v4.1 User Guide.


Q. Does 3E Plus® work with the Macintosh OS?

A. No, 3E Plus is available for the Windows® XP, Vista and Windows® 7 environments.


Q. Does 3E Plus® work with the VISTA OS and Windows® 7 OS?

A. Yes, 3E Plus works with Windows® XP, Vista and Windows® 7 environments.


Q. Why do I need to re-register for updated versions of 3E Plus?

A. We send out updates to the 3E Plus program regularly to registered users via email. The re-registration process assures us we have your most recent email. Click here for step-by step re-registering instructions. (link to the re-registration page) Your email will not be used for any other reason than communicating about updates to the the software.

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Q. Does 3E Plus® calculate metric measurements?

A. Yes, 3E Plus calculates in both metric and inch-pound units.


Q. Where can I get training on 3E Plus®?

A. With NAIMA's assistance, the National Insulation Association (NIA), has developed an accreditation program called the NIA Insulation Energy Appraisal Program, which offers a standardized approach to conducting insulation energy appraisals. This program uses 3E Plus as part of its core curriculum. NIA also has a seminar specifically on 3E Plus. For more information and to register for the NIA trainings, click here.


Q. I am having trouble installing or downloading 3E Plus program.

A. Network users may want to consult their IT staff to make they are not restricted from either downloading programs online or installing programs on their local computers. Another problem that can occur with downloaded files is corruption of the file during the download process. Users who encounter problems may want to delete the file and try again. Also, the program must be installed and run with the language set for English (United States). This is done by going to the “control panel” and opening the “Regional and Language Options” and under the Regional Options tab set for English (United States). Please note: because NAIMA is a non-profit organization, we do not have a help desk for this product. We encourage users to try to troubleshoot on their own before contacting us for help.

On your first run of the program after installation, enter the access code 3EPlus4.1 (case sensitive, no spaces) and then click OK.

Click here to download the 3E Plus v4.1 User Guide.


Q. How do I uninstall 3E Plus®?

A. If you have an earlier version of 3E Plus installed, you must uninstall prior to installing the current version. Make sure you have your customized user added information printed out before uninstalling the earlier version of the program. You will need to input the data into version 4.1. If you are not familiar with uninstalling software programs on your computer, contact your IT department or computer support professional.

NOTE: When upgrading from 4.0 to 4.1, the user must manually save all user input data. Refer to the User Guide for complete details.

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Q. Will my customized data be saved when I uninstall an older version and reinstall a newer version?

A. Beginning with version 4.1 customized "user added" program details such as insulation materials, jacketing, fuel types and base metals can be saved and easily imported when updating the program. If you are updating from an earlier version to 4.1, make sure you have your customized user added information printed out before uninstalling the earlier version of the program. You will need to input the data into version 4.1. Refer to the User Guide for complete details.

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Q. How much does 3E Plus® cost?

A. The program is free. We do require a simple registration, so that we may notify you as upgrades are implemented. We will not use your email address to market to you in anyway. To download the current version of 3E Plus, click here.


Q. I'm getting a message "An error has occurred while opening job information. 13:Type mismatch" What should I do?

A. For proper operation of 3E Plus on non-English systems, under your operating system choose: "settings -> control panel -> regional options" and select "English (United States)".


Q. When installing the program I get warnings like these:

  1. an error occurred while loading material data
  2. an error occurred loading the dropdowns
  3. an error has occurred while opening job information

A. The problem you are having is because the program uses standard US notation and the "Regions and Settings" must be set to "English (United States)". Follow this instructions to fix the problem:

  1. Go to "Control Panel" then "Region and Settings" on the "Formats" tab - check that it is set to "English (United States)"
  2. After setting to "English (United States)", uninstall the program.
  3. Temporarily turn off your firewall and antivirus software.
  4. Reinstall the 3E Plus program while set to "English (United States)". You can switch back to your region's settings afterward - but the computer must be set to "English (United States)" when installing and running the 3E Plus program.
  5. Turn your firewall and antivirus software back on.

The problem you are encountering is because program uses standard US notation e.g. 75.7 not 75,7

Please review the installation directions in the User Guide.

Click here to download the 3E Plus v4.1 User Guide.


Why can't I input the thermal conductivity in SI units when adding an insulation materials to the program using the 'options' features?

A. Currently the only way to input the thermal data for insulation and fuel under the "options" tab is to use IP units. We recommend either asking the insulation manufacturer for the thermal conductivity data in IP units  most should have it. Or, if that data is not available, you will need to convert the thermal conductivity data in SI units (W/mK) to IP (Btu·in/hr·ft2·°F).

Here is a link to a site which can quickly convert thermal conductivity in SI to IP units for use in the program. Use the Btu (IT) as opposed to the (th) because it is the (IT) value which is in the 3E program. http://www.unitconversion.org/unit_converter/thermal-conductivity.html