Antminer S4 is very noisy. Is there a way to make them silent? Any super silent fans/model for it? What do you recommend?

Yes, find a good hosting provider and send it there.

Then its silent. :p

Or have a workshop with a second floor

. I have a lot of fan's louder then any of the miners going and it's silent to me

unless I go from house to workshop.

Or if i bring up security I can hear

. But I normally have it on mute as far as noise.