Lennox SL280V Gas Furnace MD | Congressional HVAC
| Energy Efficiency | 80% AFUE |
| Stages of Heating | Two-Stage |
| Quiet Operation | SilentComfor™ Technology and Sound Absorbing Insulation |
| Motor | Variable Speed |
| Enhanced Humidity Control | ✓ |
| Blower Compartment | Insulated |
| Air Filter and Humidifier Compatible | ✓ |
| Ultra-Low Continuous Fan | ✓ |
| Ignition | SureLight® Silicon Nitride Ignitor |
| Parts Warranty | 10-Year Limited Warranty on covered components |
| Heat Exchanger Warranty | 20-Year Limited Warranty |