Up to 38 SEER & 14.0 HSPF HIGH EFFICIENCY WALL MOUNTED HEAT PUMPS 9, 12, 18 & 24,000 BTU EXTREME   Equipped with GREE’s two-stage Inverter technology, the Extreme achieves phenomenal efficiency levels of up to 80% heating capacity at outdoor temperatures of -30°C. Warranty: 10-year limited on parts and labor Most wall-mounted heat pumps work…