House of Dust

House of Dust is a 2014 supernatural thriller film directed by A.D. Calvo. The movie had its world premiere on May 20, 2014, and focuses on a group of college students that become possessed by the ghosts of former mental patients. Filming took place in Willimantic, Connecticut and Mansfield, Connecticut at the Mansfield Training School and Hospital, University of Connecticut, and Eastern Connecticut State University during the summer of 2011.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.