MSZFE12NA/MUZFE12NA - Mitsubishi Mr.Slim 12,000 BTU 23 SEER Heat Pump Hyper Heating Single Zone Ductless Mini Split Air Conditioner Highly energy-efficient system that can operate down to -13F; Updated sleek, compact indoor unit design. Includes Standard, Platinum Deodorizing, and Anti-allergy Enzyme filters for a complete air purifying system; Powerful Mode function permits system to temporarily run at a lower/higher temperature with an increased fan speed, which quickly brings the room to the optimum comfort level; Integrated i-see Sensor automatically adjusts the units operation according to temperature differences detected between the floor and the intake air, ensuring optimum comfort and energy usage Wireless remote controller, Base heater is available as an option, Limited warranty: five years on parts and defects and seven years on compressors.