EVOLUTION™ 98 VARIABLE-SPEED MODULATING GAS FURNACE
987M

AFUE EFFICIENCY: up to 98.3%

GAS VALVE TYPE: Modulating

PREFERRED™ 96 TWO STAGE GAS FURNACE
926T

AFUE EFFICIENCY: up to 96.5%

GAS VALVE TYPE: Two-Stage

LEGACY™ LINE FIXED-SPEED 90+% EFFICIENCY GAS FURNACE
915S

AFUE EFFICIENCY: Up to 96.5%

GAS VALVE TYPE: Single-Stage