Durastar builds through-the-wall units for a specific reason: permanent, dedicated cooling. This 12,000 BTU model is for the room you always want to keep comfortable, like a home office or a bedroom that gets full afternoon sun. It installs semi-permanently into a wall sleeve, which is included, for a cleaner look than a window unit and without blocking a window.

With an EER of 10.5, it runs efficiently for its class, drawing about 1270 watts on a standard 115-volt outlet. The digital controls and remote let you set a temperature between 62° and 86°F, program a 24-hour schedule, or engage a sleep mode that gradually adjusts the temperature overnight. In a 450-550 square foot space, it provides focused, quiet cooling without the drafty feel of a portable AC.

The included white wall sleeve is necessary for installation, which is a one-time project. This isn’t a unit you’ll move seasonally. Consider that before purchasing, but for a dedicated space, it delivers reliable climate control without sacrificing floor space or a window view.