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Lennox | Armstrong Air | American Standard |

Model:	Signature® Collection O23V	Elite® Series O25	Elite® Series O23
Efficiency	83% AFUE	84% AFUE	83% AFUE
Energy Star	No	No	No
Warranty	10-Year Limited Warranty on parts and controls	5-Year Limited Warranty on parts and controls	5-Year Limited Warranty on parts and controls.
	Additional Information	Additional Information	Additional Information
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Model:	80 Enhanced - Highboy	80 Enhanced - Downflow/Horizontal	80 Enhanced - Lowboy
Efficiency	Up to 83.0%	Up to 83.0%	Up to 83.0%
Energy Star	No	No	No
Warranty	• Lifetime limited warranty – heat exchanger* • 10-year limited warranty – parts	• Lifetime limited warranty – heat exchanger*. • 10-year limited warranty – parts	• Lifetime limited warranty – heat exchanger*. • 10-year limited warranty – parts
	Additional Information	Additional Information	Additional Information
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Model:	80 Advantage - Highboy	80 Advantage - Downflow/Horizontal	80 Advantage - Lowboy
Efficiency	Up to 83.0%	Up to 83.0%	Up to 83.0%
Energy Star	No	No	No
Warranty	• Lifetime limited warranty – heat exchanger*. • 10-year limited warranty – parts	• Lifetime limited warranty – heat exchanger** • 10-year limited warranty – parts***	• Lifetime limited warranty – heat exchanger** • 10-year limited warranty – parts***
	Additional Information	Additional Information	Additional Information
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