Quantum Series Inverter+ (20 SEER) and Inverter++ (22 SEER). PioneerĀ® 24,000 BTU 21 SEER2 Ductless Mini-Split Inverter++ Energy-Star Air Conditioner Heat Pump System Full Set 230V.
PIONEER 18000 BTU 23.5 SEER DC Inverter++ Ductless Mini Split Heat Pump Set 230V.