FlowHeater Download - Version 4.5.3 from 1/3/2026

• Windows 10 / 11 or Windows Server 2016 / 2019 / 2022 / 2025
• .NET Framework 4.8, you can get the Framework from here.
• Any processor (x86 32 Bit or x64 64 Bit) capable of running the operating system
• Minimum 8 GB main memory. More memory means more performance!
• At least 100 MB of free hard disk space

Please note: a Company License is a required to use FlowHeater Server. The Server Version is only available as a 64-bit variant.

FlowHeater is being constantly developed and new beta versions are released about every 2 weeks. You can actively participate in development by using beta versions. To never miss a version and be informed automatically on release of a new version, activate the update notification in Designer via "Menu->Extras->Options".

Take care: Even when beta versions share the same quality standards and testing as official versions, beta versions are not normally suitable for production use.

Changes

• Bug fix: License activation for parallel installation of 32/64-bit versions
  
  
• JSON string encoding optimized
  
  

• Bug fix: TextFile adapter with freely definable column separators

• FlowHeater Server with optimized listeners

• Preparation to change the execution order of certain Functions/Heaters

• REST API Adapter with new field type RequestQueryParameter
  
  
• Bug fix: InMemory Adapter when transferring fields from database adapters
  
  
• Bug fix: JSON Adapter and internal processing
  
  
• New Heater Abs - returns the absolute value of a number without its sign

Do you need an older version? You can find older versions of FlowHeater in the archive.