The Fedders AZ7T12W7B 12,000 BTU Through the Wall Air Conditioner will keep you cool all year round. Through the wall air conditioners are great if you do not have a window to install an air conditioner in. Fedders through the wall air conditioners have many desired features including a two piece design that allows for easy installation and removal. You install the cabinet, then slide in the modular chassis. The cabinet resists corrosion because the galvanized steel cabinet is painted. With Energy Save and Sleep modes you will save money and stay comfortable.