18 SEER: 1.5 Ton Dual-Zone Mini Split AC - Heat Pump: With a 21000 BTU total Cooling / HEATING Capacity, this Dual Zone INVERTER mini split air conditioner can cool or heat 2 separate zones of 9000 and 12000 BTU for a total coverage area of 950 ft² (400 + 550 ft²). 18 SEER coupled with Advanced Inverter DC technology provides the benefits of low operation temps, rapid cooling / heating as well as maximum energy efficiency. Full 5 Year Compressor - 2 Year Parts Warranty.