The HSX19 air conditioner has an efficiency rating of up to 19.2 SEER. Within the air conditioning unit is a two-stage scroll compressor. The Lennox System Operation Monitor, an onboard diagnostics system, reviews system performance and can communicate with select thermostats with a “call for service” indicator. According to the manufacturer, noise-reduction features include a patent-pending fan design, compressor with new vibration insulators, a new sound dampening fan grille, and a Hushtone® cabinet. The unit is backed by a 10-year limited warranty on the compressor and a five-year limited warranty on all remaining covered components.

Lennox Industries Inc., P.O. Box 799900, Dallas, TX 75379-9900; 800-953-6669;

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