Image saved as DDS with 16f format in photoshop has strange FOURCC text
The tool seems to be generating an unofficial extended version of DDS in which the FOURCC code is replaced by a value from the D3DFORMAT enum. The code 0x0000006F translates to decimal 111, which translates to D3DFMT_R16F.

The Microsoft DDS documentation notes that this is seen sometimes, although not recommended: DDS Variants


  There are some common variants in use where the pixel format is set to a DDPF_FOURCC code where dwFourCC is set to a D3DFORMAT or DXGI_FORMAT enumeration value. There is no way to tell if an enumeration value is a D3DFORMAT or a DXGI_FORMAT, so it is highly recommended that the "DX10" extension and DDS_HEADER_DXT10 header is used instead to store the dxgiFormat when the basic DDS_PIXELFORMAT cannot express the format.