FR5 Software

FirstRate5® house energy rating software

FirstRate5® is an easy-to-use interactive tool with a graphic user interface that enables designers and thermal performance assessors to generate energy ratings for a home by tracing over floor plans. The software integrates the AccuRate calculation engine to estimate the annual heating and cooling energy and can be used to rate an existing design or as an interactive tool to optimise the design beyond compliance.

Access to legacy versions of FirstRate5

  • Why do legacy versions not calculate automatically on the FR5 website?

FirstRate5 v5.2.3 (3.13)

  • How do I allow for a ‘window’ in an internal wall?

FirstRate5 v5.2.1 (3.13)

  • What are the new features of FR5 v5.2.1 (3.13)?

  • Why is the Save command disabled when I upgrade my earlier files?


  • What certificates will be produced by the FirstRate5 website from 1 July 2015 onwards?

  • How do I remove my NatHERS accreditation number from my FirstRate5 account?

  • What does the 'Head Height' of a window refer to?

  • When will the NatHERS triple calculation be implemented in FirstRate5?

  • What system requirements are necessary for FirstRate5?

  • Does FirstRate5 work with Java 9?

FirstRate5 v5.2.0 (3.13)

  • What are the new features of FR5 v5.2.0 (3.13)?

  • Upgrading files: How can I revert back to an earlier version of my upgraded file?

  • Wing walls: Do the automatically calculated wing walls include the wall thickness?

  • Wing walls: Why do we have to review automatically calculated wing walls?

  • Wing walls: How do screens differ from wing walls and how do I model oblique obstructions?

  • Wing walls and eaves: For eaves and wing walls, what is meant by 'top of wall'?

  • Eaves: Can I still specify the eaves to all external walls in one operation through the Zoning tab?

  • Eaves: Can I select several walls in the Plan tab and attach them all to the same eave in one operation?

  • Windows: Where can I learn how to use the new default windows?

  • Weather-stripping and insect screens: When can I turn on/off weather-stripping and insect screens?

  • Opaque louvre windows: What is new in relation to opaque louvre windows?

  • Certificate: Why does my preview certificate say "non-accredited"?

  • Certificate: Why does the NCFA sometimes not equal the sum of the individual zone areas?

  • Group certificate: How do I produce a NatHERS Group Certificate for a multi-unit development?

  • How do I turn off connections to screens (for example) to declutter my Plan view?

FirstRate5 v5.1.11

  • What are the new features of FR5 V5.1.11?

  • How can I uninstall my previous versions of FirstRate5?

  • Can I still use the pre-defined wall constructions or do I have to use the wall builder?

  • I understand from v5.1.11 I will have to specify an airspace rather than number and type of foils, how do I do this?

  • What is the ceiling penetrations calculator?

  • Are v5.1.11 project files ‘backwards-compatible’?

Online certificate generation system

  • Will installing a new version of FR5 overwrite older versions of the software on my machine?

  • What are the features of the certificate generation system?

  • How does the new certificate generation system work?

  • If I download the latest version of FirstRate5 will I be charged to produce certificates or to download the software?

  • How do I download the latest version of FirstRate5?

  • How do I register to download and use the latest version of FirstRate5?

  • How can I get help on using the new website?

  • Is the latest versionof FirstRate5 fully accredited by NatHERS and can it be used for compliance?

  • What information will be included on the new certificate?

  • Can I make revisions to an issued certificate?

  • Will there be a reduced fee based on the number of credits purchased?

  • How are you promoting use of the software by users who are accredited Thermal Performance Assessors?

  • Can I pay for the certificates that my employees/sub-contractors produce?

  • How do I know my credit card details will be secure?

 Guidance Notes
           01 Wall Builder + Upgrade v1.0
           02 Wall Builder Examples

Instructional videos