HeatWave is FireGiant's Visual Studio extension for WiX v4. HeatWave Community Edition is available free of charge and provides:
HeatWave peacefully coexists with the WiX v3 Visual Studio extension, which lets you mix and match WiX v3 and WiX v4 projects in a solution. You can convert the WiX v3 projects to WiX v4 gradually.
HeatWave is available from the Visual Studio Marketplace.
Double-click the downloaded .vsix file to install HeatWave.
When new versions of HeatWave are released, you can update from within Visual Studio: