Thermocore 27000 BTU AC-Heat 19 SEER. 27000 BTU Tri Zone Energy Star Mini Split AC. 18.5 SEER Efficiency w/ Heat Pump Technology. With a 27000 BTU total Cool / Heat Capacity, the Thermocore T118D-H230-9+9+9 Energy Star mini split air conditioner can cool or heat 3 separate zones of 9000 BTU…