The MRCOOL Olympus Cassette 9,000 BTU is a compact ceiling-mounted air handler. It is part of our Ceiling Cassette Multi-Zone collection. This unit is ideal for smaller rooms where you want a 360-degree air throw. It installs flush with the ceiling for a modern, clean look. You can find it used in various Multi-Zone configurations. It's a great way to save wall space while providing superior comfort.