As far as I can see the nozzle fan reduced the noise a lot and if I see how fast the nozzle temp is cooled compared to the old one after printing, it is cooling better or the same as the old one. The temp when printing of the teflon is 52 degree Celsius.
Normaly I do not mind the noise but with prints overnight the "finished" printer was really making a lot of noise now I do not hear it anymore. As I now use Colorfabb XT and for better printing reduced the site fans to 50% this noise problem is also solved.