FEDS 8.2 includes several updates and enhancements, plus fixes to issues identified in earlier versions.

• A new 'Rebase Optimized Case' feature allows users to create a new case from the results of an optimized case (including all selected retrofit measures).
• A new Fuel Type Availability option allows more nuance to fuel switching. Selecting the new ‘Existing’ option will permit FEDS to consider a replacement technology using that fuel type ONLY for equipment currently using that fuel (i.e., FEDS won't recommend switching to that fuel outside of equipment that currently use it).
• The automated pairing of heat and cool technologies has been expanded and a new 'Do not pair this tech' option has been added to increase flexibility.
• Inference improvements:
  • The Run Year now defaults to the current year but may be changed by the user.
  • The inferred LED lighting fixture configuration has been updated to take the use area type into account.
• The latest DOE discount rate and energy escalation rate projections as reported by the Energy Price Indices and Discount Factors for Life-Cycle Cost Analysis (Annual Supplement to NIST Handbook 135). This includes expanded support for fuel price projections across the nine Census Divisions, in addition to the prior four Census Regions.
• Third-party software component updates for enhanced performance and security.

Improvements to context-sensitive help, input validation, and minor fixes to reports.

FEDS 8.1.2 updates include the following:

• The latest DOE discount rate and energy escalation rate projections as reported by the Energy Price Indices and Discount Factors for Life-Cycle Cost Analysis – 2022 (Annual Supplement to NIST Handbook 135)
• Improvements to the EPW import capability including allowing the user to edit the default weather station name
• Minor GUI enhancements including improved input help and validation
• Third-party software component updates for enhanced performance and security
• Other minor updates and enhancements.

Key changes in FEDS 8.1.1 include the following:

• Corrections to issues identified in FEDS 8.1:
  • Initialization error leading to zero heat/cool/ventilation energy use in new building models created in v8.1 
  • Error impacting the display of the last page of PDF text reports
  • Improper handling of unserved portion of building set when ‘floor area’ units are specified
• Improved input handling and validation (including a number of improvements for central plants and loops, greater flexibility for heat/cool setpoints, and more)
• Updates to the latest versions of all third-party software components to improve performance and minimize potential vulnerabilities
• Other minor updates and enhancements.

FEDS 8.1

Key changes in FEDS 8.1 include the following:

• The latest energy escalation rate projections as reported by the Annual Supplement to NIST Handbook 135
• Inference data improvements
• Expanded support for custom weather data imports
• New retrofit options including additional electric space and water heating technology options allow for expanded analysis of building electrification potential 
• Report updates:
  • The study period for each retrofit measure was added to the CSV report. 
  • The Compliance Tracking System (CTS) report was updated to match the latest version of the CTS reporting template. 
  • The technology consumption output profiles were updated to reflect the energy use of all buildings in each building set. 
• All third-party software that FEDS relies on were reviewed and updated to the latest versions for improved performance and security.
• Several software errors were resolved in the following areas of the GUI:  hot water system input access, navigation panel display, time-of-day electric rate period specification, and Cancel operations when navigating away from a screen with unsaved changes.
• Other minor corrections and enhancements.