W3SA/W4SA Two Stage Wall Mount A/C, 3 and 4 Ton - archived April 4 2026 new pages were creating making this page duplicate and obsolete

The world’s most energy efficient wall-mounted air conditioner features a multi-step capacity compressor for increased efficiency, quieter operation and improved reliability. Simple thermostatic control seamlessly stages the compressor and indoor airflow rate between high and low capacity operations without cycling the compressor to maximize comfort, humidity control, energy efficiency and overall reduction in compressor cycling for improved system life. Factory or field installed accessories are available to meet specific job requirements.