What type of portable or window A/C unit do you have? While air conditioners all work by basically the same mechanisms, there are some differences in design. Fixed-chassis window air conditioners, which fit in an open window and vent hot air out the sides, top and back, are among the most common. Short, wide units are available for double-hung windows, and tall, skinny units are made to fit into slider and casement windows.
Portable air conditioners sit on the floor underneath or near a window and vent hot air through a duct that runs out the window. These air conditioners come with single or double-hose configurations. Double-hose portable air conditioners work faster and more efficiently than single-hose units.
Saddle-style air conditioners combine the best of both portable and window A/Cs. They fit securely over the window sill, hanging down on both sides of the window. If you’re concerned about dropping a unit out the window, the saddle design could ease your mind and make installation easier.
All units will come with equipment to seal the gaps between the unit and the window. If you’re installing a unit in a casement or slider window, you may need some additional plywood or plexiglass to seal the rest of the window above the unit.