Variable-speed swing compressors. Quiet digitally commutated fan motor. High-density compressor sound blanket. Compatible with Goodman GTST connected thermostat and other Goodman communicating equipment. Proprietary control algorithmic logic. In communicating mode, only two low-voltage wires to outdoor unit required. Diagnostic indicator lights, seven-segment LED display, and fault code storage. Propietary Inside intelligence for diagnostics. Quiet-mode - provides enhanced acoustical comfort, up to 3 different sound levels (as low as 45dBA). Field-selectable boost mode increases compressor speed during unusually high loads. Field-installed bi-flow filter drier. Coil and ambient temperature sensors. Suction pressure transducer. Sweat connection service valves with easy access to gauge ports. AHRI Certified; ETL Listed.