A three-zone system with three differently sized heads, 7000, 9000 and 12000 BTU, on one 24000-BTU outdoor unit, which is the configuration for a home where no two rooms are alike. A small bedroom takes the 7K head at 0.6 Ton, a medium room takes the 9K at 0.75 Ton, and the main living space takes the 12K at 1 Ton, so capacity is graded rather than averaged across the house. Every zone is controlled individually, meaning a guest room can sit off for weeks without affecting the two rooms in daily use, and the compressor produces only what the running zones ask of it. Dehumidification follows the same grading, at 35.5 pints a day from each of the 7K and 9K heads and 51 pints from the 12K, with indoor noise of 30 dB on the two smaller heads and 32 dB on the largest. Efficiency is 23 SEER2 with HSPF2 10, delivered by advanced inverter technology, and the system cools at 125 degrees Fahrenheit and heats at minus 13 degrees, with chassis heating preventing freezing on cold days. WiFi and a digital-display remote handle six modes and five fan speeds, a 24-hour timer covers programmable scheduling, and the filters are removable and washable. R32 refrigerant has a lower environmental impact. The compressor carries a 7-year warranty and parts 5 years, the system complies with Energy Star, AHRI and ETL, and it ships in 5 cartons.