6Wall sleeves — Wall sleeves are available as a rear or sideinstallation. The wall sleeve can be installed during con-struction and the unit installed at a later time. The sleevecan bear the entire weight of the 52V unit and provides awatertight seal against wind and weather. The condensatedrain is built directly into the wall sleeve for pre-installationahead of the unit. Four wall sleeve depths are available toaccomodate wall thicknesses of 5 to 20 inches. A hurri-cane sleeve is available with a thicker, more durable con-struction for areas that may experience intense weatherconditions. Each sleeve includes a factory-installed guard tocover the sleeve opening during construction.Exterior grilles (architectural louvers) — The exteriorgrilles attach to the outside face of the wall sleeve and pro-vide protection for the unit.Interior panel — The interior panel is used for access tothe unit installed in the closet. The panel is available as alouvered panel or a solid panel. The solid panel will resultin lower sound levels. An external air grille and unit mountfilter are required. The louvered panel allows air return intothe closet to the unit and includes an 18 x 24 x 1-in. filter.Panels are shipped 10 per carton.Thermostats — A complete line of thermostats is avail-able to meet any control requirements. Thermostats areavailable in both horizontal or vertical layout types. Bothcooling and electric/hot water heat thermostats (5 wire)and heat pump thermostats (6 wire) are available.Field-installed accessories