This solid-sided wall case is made for use in the installation of GE 42" Zoneline Chassis models in a deeper wall. Constructed of galvanized steel and expanded polystyrene foam insulation, this sleeve will bear the weight of your GE Zoneline when it is installed. The galvanized steel sleeve is welded, includes a baked on enamel finish and is protected with a sealing compound to prevent rust. It is 18" deep
All new PTAC installations require a wall sleeve and grille.