The Conquest 90 Max is a high-efficiency, two-stage gas furnace. The GTUA Series features five models with input rates from 75,000 to 120,000 Btuh, all with AFUE ratings of 92 percent. The ComfortMax control adjusts the flow of gas to the furnace for maximum fuel efficiency and comfort using an integrated, two-stage control board, the manufacturer states. According to the company, in-shot burners are engineered to provide the most efficient air-gas mixture. Gas, electricity, and condensate drain connections can be made on either the left or right side. Combustion air can be piped to either the top or side of the cabinet. Connections for accessories such as an air cleaner and humidifier come standard, and the control board is set up to handle central air conditioning.

Comfort-Aire, 1900 Wellworth Ave., Jackson, MI 49203; 517-787-2100;

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