System Requirements
Licence Information

Downloads are available for WINFAP below. Most users should download WINFAP 5. To allow continued use for existing studies, the legacy WINFAP 4 can be installed alongside WINFAP 5.

Please also download the latest Peak Flow Dataset.

WINFAP 5 uses the new NRFA Peak Flow catchment descriptor xml files, and has improved data auditing functionality. WINFAP 5 does not support old Peak Flow Datasets (version 9 and earlier) nor WINFAP 4 project files (.feh4).


  • Network licence

    Download this version if you purchased WINFAP from our reseller, Jacobs. This version uses network and cloud-based licensing allowing any user across your organisation to access the software as long as a licence is available, including remotely via VPN.
    See the Jacobs website for more information and FAQs

    Download WINFAP5 5.1.8704 - Network licence
    Version: 5.1.8704 | Release date: 31 Oct 2023 | Checksum: 792b2921944917e75c554d4af5b571a5
  • Release notes:


  • Download WINFAP4 4.2.7282
    Version: 4.2.7282 | Release date: 09 Dec 2019 | Checksum: ec28dd64983eedbe398898faaa3b2434
  • Release notes:

    • WINFAP 4.2 incorporates the Peak Flow v8 data.
    • There is no requirement for WINFAP 4.0 or 4.1 users to upgrade to WINFAP 4.2 if you have downloaded the Peak Flow v8 data from the NRFA website.
    • Note if you upgrade from WINFAP 4.0 or 4.1 to WINFAP 4.2 you will need to update the Load Options Station file path, as this will maintain your previous settings.
    • For new installations of WINFAP 4.2, your Load Options Station file path will automatically connect to Peak Flow v8 folder.