| SEER = SEER is an acronym for Seasonal Energy Efficiency Ratio... |
| Ton = Tonnage is used to express the one hour cooling... |
| BTU = BTU is an acronym for British Thermal Unit... |
| 2-Stage = A 2-stage gas furnace is like having two furnaces in one... |
| 80% efficient = Represents the percentage of fuel that is converted to useable heat... |
| 95% efficient = Represents the percentage of fuel that is converted to useable heat... |
| Horizontal = Refers to the furnace air delivery configuration... |
| Upflow = Refers to the furnace air delivery configuration... |
| Downflow = Refers to the furnace air delivery configuration... |