16 SEER: 4 Ton Tri-Zone Ductless Mini Split AC - Heat Pump: With a 48000 BTU total Cooling / HEATING Capacity, this Tri Zone INVERTER mini split air conditioner can cool 3 separate zones (12000 + 18000 + 18000) for a total coverage area of 2100 ft² (600 ft² + 900 ft² + 900 ft² areas). 16 SEER cooupled with Advanced Inverter technology provides the benefits of low operation temps, rapid cooling / heating as well as maximum energy efficiency.es.