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.

Release of FirstRate5 v5.2.5 (3.13)

by FirstRate5 | Feb 23, 2017

FirstRate5 v5.2.​5 (3.13) is now available as a free download from SV recommends that all users upgrade to this version.

The only change included in this version is an updated AFRC custom windows and roof windows library.

Users should note that the AFRC has made minor changes to 20 AWS window codes in the updated custom windows library included in FR5 v5.2.5 (3.13). If an existing project file using the affected AWS windows is opened in FirstRate5 v5.2.5 (3.13), a ‘Missing window types’ error message will be displayed and the affected windows will need to be respecified.

Transition Arrangements for FR5 v5.2.4 (3.1.3)

Until 23 March 2016 (5pm) a transition period will be in place. During this period both v5.2.4 (3.1.3) and v5.2.5 (3.1.3) files will automatically calculate on the FirstRate5 website. Please note that all project files created using a version of FirstRate5 v5.2.4 (i.e. v5.2.4 or v5.2.4a) will be calculated using the v5.2.4a calculation engine when uploaded to the FirstRate5 website.

After ​23 March 2016 (5pm) v5.2.5 (3.13) files will continue to automatically calculate on the FirstRate5 website, however v5.2.4 (3.13) files will calculate by special request only.

For more information on FirstRate5 visit, submit a query through the online contact form or email

Note: It is the user’s responsibility to ensure certificates are produced with the appropriate version. If a user chooses to inappropriately use an earlier version of FR5 to produce a certificate, they run the risk that a Building Surveyor will reject the certificate leading to further certificate costs.

Note: Installation of minor releases involving a letter change, eg,  v5.2.2b to v5.2.2c, will by default overwrite the previous version, while major releases involving a number change, eg, v5.2.4 (3.13) to v5.2.5 (3.13), will by default install beside older versions.