The high-efficiency Smart Comfort™ IIS 90 gas furnaces provide improved comfort of two-stage operation with conventional multispeed PSC blower motors, the company states. These models reduce the ...
The SmartComfortâ„¢ VS 80 two-stage gas furnace features 80-percent AFUE efficiency and a variable-speed blower in a compact design, says the company. It can be installed in upflow, downflow, ...
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