The G61V furnace line, a part of the Dave Lennox Signature™ Collection, has two-stage operation. It has an efficiency rating of up to 94.6 percent. The variable-speed motor is designed to automatically adjust the control of airflow for comfort. The furnace has a two-stage gas valve, which adjusts the gas output to accommodate the two levels of heating. According to the manufacturer, the furnace has SilentComfort™ technology to deliver quiet, consistent heating. Features include a SureLight® control board; a DuralokPlus® heat exchanger, made from patented ArmorTuf aluminized steel; and an insulated, durable steel cabinet with a textured paint finish.

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

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