Furnaces/90% 

Comfort
Level

Model
Efficiency
Blower Stages
Heating Stages
Warranty (Limited)
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Amazing
Comfort

XC95
Up to 95%
Variable Heat/
Variable Cool
3-Stage
20 Year Heat Exchanger, 5 Year Parts, 1 Year Labor

True
Comfort

XV90
Up to 95%
Variable Heat/
Variable Cool
2-Stage
20 Year Heat Exchanger, 5 Year Parts, 1 Year Labor

Improved
Comfort

XL90
Up to 93%
2 Speed Heat/
1 Speed Cool
2-Stage
20 Year Heat Exchanger, 5 Year Parts, 1 Year Labor

Standard
Comfort

XR90
Up to 92%
1-Speed
1-Stage
20 Year Heat Exchanger, 5 Year Parts, 1 Year Labor