[msv]

Originally posted by Pakir
Thanks!

The big rad measures 50x50x30cm or 19.5x19.5x12 inches.
The fan takes about half the space.

Unfortunatly i cant mount it outside since i live in a small apartment on the first floor, otherwise i would

I was thinking of maybe buying a 34cm tablefan and mounting it
instead of the fan thats in it now or I'll change the motor to a regular 230VAC...

Oh, one question, what is this thing?


I think it's some kind of air vent, it sat on both the intake and the
outlet pipes. If it is, should I use this for venting the rad when filling it?

The "thing" on the pic is, as You assume, for bleeding a large radiator, as in letting out air from Your rad. If You ever heard the term "elementnyckel" (radiator key) (can be bought at Clas Ohlsson) that´s what You use for opening the valve in the pic and bleed the rad.
Ditch it and bleed Your system with other devices. It looks like it´s in a crappy condition and won´t do You any good.
regards
Mikael S.