Choosing between a wall-mounted and a ceiling cassette air conditioning unit largely depends on the space available and aesthetic preferences. Wall-mounted units are generally easier to install and may be less invasive, making them a good choice for both residential and small office spaces. They are visible but offer flexibility in placement and can be a feature if chosen in a complementary design or colour.
Ceiling cassette units are almost entirely concealed, except for the grille, and are designed to blend seamlessly into the ceiling, making them ideal for maintaining the aesthetic integrity of a room. They distribute air more centrally, providing even cooling or heating over a larger area, which can be more efficient for larger spaces or commercial settings. The choice may also depend on the structural limitations of the building; for example, older or listed buildings might accommodate wall-mounted units better.