IC7300 fan

I did not get a clear answer to my question about this a few days ago.

Basically does the fan run at full speed all the time on TX or does it get faster only when hot?

If it is quiet at low power that is OK. What would be annoying is running 5-10W yet still having to live with a noisy fan. Any answers welcomed.

What I would really like is the low power version with CE approval and a good guarantee. Somehow I suspect this is unlikely.