The 24000 BTU this Dual Zone INVERTER mini split AC with Ceiling Cassette can cool or heat TWO separate zones (2 x 12000 BTU) for a total coverage area of 1100 ft² (TWO 550 ft² areas). The Air handlers are discreetly recessed into a ceiling panel - only the grill is visible. Inverter technology provides the benefits of low operation temps, rapid cooling / heating, as well as maximum energy efficiency. R410A Pre-charged .