With up to 80 percent AFUE, the Performanceâ„¢ 80 58CTW is a two-stage, var-iable-speed gas furnace. ComfortHeatâ„¢ technology offers decreased sound levels, longer cycles, fewer temperature swings ...
Furnaces with variable-speed blower motors are becoming more popular - no question about it. The benefits include electrical efficiency because a variable-speed motor consumes less energy than a ...
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