Variable-speed two-stage gas furnace – 80% AFUE

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Unlike single-stage furnaces — which heat up fast and shut down fast, going from too hot to too cold — this Atlas Butler gas furnace delivers consistent heat and overall comfort.

The quiet, two-stage system operates at low heat most of the time and automatically modulates to higher heat production if the temperature drops. Run the high-efficiency fan continuously to improve indoor air quality.

At 80% AFUE, you can depend on substantial energy savings, thanks to the unique RPJ® III heat exchanger. The weld-free construction, aluminized steel material, and the integrated ripple-edged design together increase efficiency and save energy.