A 12000-BTU mini split heat pump that keeps heating down to minus 15 degrees Fahrenheit, the point at which most heat pumps in this class have handed the job back to a backup heater. A built-in chassis electrical heating system is what makes that possible, and the operating envelope runs all the way from minus 15 to 126 degrees. Efficiency is 24 SEER2 with HSPF2 10, among the highest ratings in the 12000-BTU class, and the unit is certified to Energy Star, ETL and AHRI standards. Inverter technology delivers that efficiency by holding output steady rather than cycling, which is also why operation stays silent and stable, and the source rates the saving at about 30 percent against a conventional air conditioner. Control is flexible: a free app runs the unit remotely, it works with Alexa for voice control, and the remote switches the temperature display between Fahrenheit and Celsius. Seven modes cover the year and 4 fan speeds run low, mid, high and turbo, while airflow adjusts up and down as well as left and right for wide coverage. For sleeping there is a screen off function and a 24-hour timer. Maintenance is handled by high-temperature self cleaning that runs condensation, frost melting and sterilisation, plus removable washable filters. The system uses R32, covers up to 750 sq ft on 115V, moves 412 CFM, clears 51 pints a day at 22 to 43 dB, and ships in 2 cartons with a comprehensive kit.