There have been several threads on this in the past. The shortest answer is that the Fibaro RGBW controller can be used for low voltage application. There are some other alternatives as well, but I think that’s the most popular. It is available on either the US or UK frequencies. See the following discussion:
12vdc Z-Wave (for switching 4 12v LED lines and 2 12v fans)
As far as the fans go, as discussed in the thread above that can be more complicated. If you don’t want to go the two device route discussed in that thread, you can probably use one of the roller motor controllers, like qubino, for the fan. But check the specs.