30°C watertemp is fine when you have 25° room temperature (and how ist Walter connected to your PC? ;D).
what radiator-type do you have?
an EVO, XT or pro?
the evo already has a built-in air shroud.

that's between Walter and me
I have 1 airplex evo 240 and 1 airplex evo 120
Thanks. that's a relief to know.