12,000 BTU Mini Split AC, 19 SEER2 Wall Mounted AC with Heat Pump & Installation Kits, Ductless Inverter Split-System AC. 12,000 BTU Mini Split AC, 19 SEER2 Wall Mounted AC with Heat Pump & Installation Kits, Ductless Inverter Split-System Air Conditioners Cools up to 550 Sq.