A 12000-BTU ductless mini split running at 21 SEER2, one of the higher efficiency ratings in this capacity class, which is where the advanced inverter technology pays for itself: the compressor modulates its output continuously instead of switching hard between full power and off, so the room holds its temperature and the energy bill drops rather than spiking with every cycle. Cooling and heating cover spaces of up to 750 sq ft on a 208-230V supply at 60Hz, drawing 920W cooling and 940W heating, and the system is certified to Energy Star, ETL and AHRI standards. Seven modes and four fan speeds handle the whole year rather than one season, and a built-in self-cleaning function keeps the coil and blower in condition without intervention, backed by a filter that lifts out and washes. Indoor noise is 23 dB, low enough that a 24-hour timer set for overnight running will not disturb sleep, and the multifunction remote reaches up to 26 ft away. The system uses R32, an efficient refrigerant with lower environmental impact, and operates in ambient conditions from 14 to 122 degrees Fahrenheit with a 60 to 90 degree setting range. Dehumidification runs at 42 pints a day with 353 CFM of airflow, HSPF2 is rated 10, and the indoor head measures 30-in by 8-in by 11.5-in against a 27.5-in by 11-in by 21-in outdoor unit. The compressor carries an 8-year warranty and parts 5 years, and a complete installation kit ships in the 2 cartons.