Fan-less. HP's 15.6-inch convertible wants to score with an energy-efficient processor from Intel's new Broadwell lineup, which enables a fan-less design in the Envy. A Full HD, IPS screen and good battery life is also part of the bundle.
http://www.notebookcheck.net/HP-Enyy-x2-15-c000ng-Convertible-Review.131017.0.html