There is disclosed a recessed cantilever mount and an installation process. The mount may comprise a cradle adapted to attach to a wall of a chassis and extend through an opening of the wall into the chassis, a retainer adapted to attach to the cradle and secure a stem of an electric discharge device to the cradle, wherein the stem is at least partially recessed in the cradle, and a tube of the electric discharge device is recessed within the chassis. The process may comprise recessing a base of a cradle through an opening in a wall of a chassis of an air handler selected from the group comprising a PTAC and a unit ventilator, securing the cradle to the wall, inserting a tube of an electric discharge device through an opening of the base into the chassis, and securing a rim of the electric discharge device against the base.