equesteQUEST® is a 3rd party energy simulation tool that is used by consulting engineers and energy modelers to analyze building designs, confirm energy code compliance and to demonstrate energy performance improvements for LEED® certification. eQUEST® uses the DOE-2 energy simulation program, which was previously developed by the U.S. Department of Energy.

Daikin Applied has developed input files for our SmartSource® and Enfinity® WSHP products, to make it easy to develop eQUEST® building energy models.

Currently, the latest publicly-available version of eQUEST® is 3.65, and the software with all supporting documentation can be downloaded at the website Because eQuest® is freeware, engineers who license other software may also utilize eQuest® in order to model more advanced systems like SmartSource® and Enfinity® water source heat pump.



Daikin has made the following resources available for simulating the SmartSource® and Enfinity® water source heat pumps in eQUEST® software.

Links coming soon.

Novice eQUEST® users are likely to experience the steep learning curve typical of other energy modeling software. Extensive documentation is included with the eQUEST® software itself when it is installed. There is also a 'Help Menu'; however, since eQUEST® is a freeware, there is no dedicated support staff available to respond to questions. eQUEST® has a large user community, many of whom participate in the online forum Equest-users. Several building performance mailing lists, including Equest-users, have been created and made accessible at this website:

Daikin will provide support regarding issues specific to this water source heat pump project for a limited time:


How Does An eQUEST® User Download and Import The Daikin Import File(s)?

1. eQUEST® user Clicks on the Download tab.

2. User enters and submits their email address.

3. If user is currently a Daikin Applied subscriber, the download will available
a. If user is not a current subscriber, they will prompted to enter their subscription information and then the download will be available.

4. User downloads and extracts the files in the

5. User imports "Daikin Heat Pumps eQUEST.INP"

6. User runs building simulation to evaluate whole building operating cost utilizing Daikin WSHP performance. This will take a few seconds, possibly up to a few minutes for large models or slower computers.

How Are The Daikin WSHP Performance Curves Packaged?

A file called the Daikin Input File was designed to be imported into energy models created using eQUEST® 3.65 and/or the latest version of DOE2. The Daikin Input File contains all of the WSHP custom performance data. By itself, it is not a complete building energy model. Once downloaded, the Daikin Input File for a specific WSHP model and size can be saved in a location convenient to the user for import into an eQUEST® building model.

The Daikin SmartSource® heat pumps must be modeled in eQUEST® as PVVT systems, and Enfinity® heat pumps must be modeled as PSZ systems. PVVT and PSZ are system keywords assigned by default as expression/values in the Daikin Input File.

To simulate a PVVT or PSZ as Daikin WSHP, the last two digits of the cooling capacity must be entered (ones and tens digits). Typical capacities and special two-digit codes are shown in Appendix A of the Modeling Guide.

What Will BeThe Role Of Your local Daikin Sales Office?

This WSHP/eQUEST® integration will be similar in nature to the current Daikin Revit library currently provided for engineers to use. The Daikin Revit files are used by engineers who are well versed in Revit. Similarly, the WSHP input files will be used by engineers who are well versed in eQUEST®. All questions from engineers specific to the eQUEST® WSHP input files should be directed to your local Daikin sales office.

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