Our offices will be shut from close of business on Tuesday 23rd December 2025 until Monday 5th January 2026. Between these dates only credit card payments for ReFH 2 and WINFAP 5 will be dispatched, all other orders will go out in the new year. We will be providing limited software support on Monday 22nd and Tuesday 23rd December and the last posting date for LowFlows 2 dongles will be Thursday 18th December until Monday 5th January.
**Wishing you a very Merry Christmas and Happy New Year** :christmas_tree:
Our offices will be shut from close of business on Tuesday 23rd December 2025 until Monday 5th January 2026. Between these dates only credit card payments for ReFH 2 and WINFAP 5 will be dispatched, all other orders will go out in the new year. We will be providing limited software support on Monday 22nd and Tuesday 23rd December and the last posting date for LowFlows 2 dongles will be Thursday 18th December until Monday 5th January.
**Wishing you a very Merry Christmas and Happy New Year** :christmas_tree:
Support > ReFH 2 Support > ReFH 2 FAQ

ReFH 2 FAQ

 FAQ
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Frequently Asked Questions

General

  1. How can I be kept informed of ReFH 2 updates?
  2. Using ReFH 2 with InfoDrainage, Flood Modeller, InfoWorks ICM, Flow and TUFLOW

Installation and System Requirements

  1. Remote access and remote activation of ReFH 2
  2. Updating and reinstalling ReFH 2
  3. ReFH 2 system requirements

Licensing

  1. Can I still use WINFAP/ ReFH 2 with third-party tools if I switch to a network licence?
  2. Can users migrate from standalone to network WINFAP/ReFH2 licences mid-contract?
  3. Can I mix licences between network and standalone?
  4. Network licences – if a new version of WINFAP or ReFH2 is released, can I upgrade?
  5. How do I renew my ReFH 2 licence?
  6. Licensing and installing ReFH 2 for use with InfoDrainage, Flood Modeller, InfoWorks ICM, Flow and TUFLOW
  7. How do I view my licence information and expiry date?

Technical

  1. How to derive rural and urban rainfall for input into 2D hydraulic models
  2. How should I reference ReFH 2 in reports?
  3. ‘ReFH 2 calculation failed’ error message with ICM
  4. Why does my report identify that the URBEXT2000 is ‘user-defined’ when I have not edited the urbanisation parameters?
  5. Can I use FEH22 rainfall in ReFH2?
  6. Error importing descriptors from file – invalid child ‘DDF2022Values’
  7. Shifting rainfall event data when importing observed event data
  8. ReFH 2.3 Parameterisation of DAYMOD for observed events
  9. How do I know which ReFH 2 model I’m using?
  10. Why are the climate change factor and observed rainfall buttons greyed out?

User Interface

  1. Text displaying at wrong size on high-DPI screen