One of the reasons why I almost bought a rMB 2015 was that it has no fan and is "silent". Nothing bothers me more than a computer that I can hear working. Drives me nuts. When I had a 2013MBA for 6 months, it was dead silent which I found to be amazing and surprising. I picked up a rMBP 13" recently and I'm surprised and happy to report this thing is also silent. Even during photoshop and other image editing programs. Clearly these devices still have a fan but apple has done such a good job with the fan design they are truly silent computers. I even went so far as to put my ear right on the unit, and it's still silent. So if anyone is sold on the Macbook having no fan and being Apple's "first silent" macbook, well don't buy into that marketing because while the no fan is true, the silent part is not. I wanted to add my usage is mainly photoshop, lightroom, and web.