The Ruud Super Quiet 80 gas furnaces have an AFUE rating of 80 percent. The line's input rates range from 50,000 to 150,000 Btu. Features include solid upper and lower doors, a robust ignition system, four-speed blower taps, unique combustion air options, and time-tested integrated furnace control, the company states. The furnaces are the quietest mid-efficiency, single-stage gas furnaces available, claims the manufacturer. The furnaces, which are 34 inches tall, come with a 5-year all-parts warranty and a 20-year heat exchanger warranty.

Rheem Air Conditioning Div., P.O. Box 17010, Fort Smith, AR 72917-7010; 479-646-4311;

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