Lennox Furnace Manuals — page 2
Select your Lennox model number below for installation steps, settings, maintenance schedules, troubleshooting and the full specification sheet. Your model number is printed on the rating plate.
Lennox furnaces by model number
| Model | Description | Certified |
|---|---|---|
| ML296DF090XV60CML296XV-Series | 96% AFUE gas furnace | May 2026 |
| ML296UH045XV36BML296XV-Series | 96% AFUE gas furnace | May 2026 |
| ML296UH070XV36BML296XV-Series | 96% AFUE gas furnace | May 2026 |
| ML296UH090XV48CML296XV-Series | 96% AFUE gas furnace | May 2026 |
| ML296UH110XV60CML296XV-Series | 96% AFUE gas furnace | May 2026 |
| ML297DF070XV48BML297XV Series | 97% AFUE gas furnace | May 2026 |
| ML297DF090XV60CML297XV Series | 97% AFUE gas furnace | May 2026 |
| ML297DF110XV60CML297XV Series | 97% AFUE gas furnace | May 2026 |
| ML297UH045XV36BML297XV Series | 97% AFUE gas furnace | May 2026 |
| ML297UH070XV36BML297XV Series | 97% AFUE gas furnace | May 2026 |
| ML297UH090XV36CML297XV Series | 97% AFUE gas furnace | May 2026 |
| ML297UH090XV60CML297XV Series | 97% AFUE gas furnace | May 2026 |
| ML297UH110XV60CML297XV Series | 97% AFUE gas furnace | May 2026 |
| ML297UH135XV60DML297XV Series | 97% AFUE gas furnace | May 2026 |
| SL297UH040NV36BSL297V | 97.5% AFUE gas furnace | May 2026 |
| SL297UH060NV36BSL297V | 97.5% AFUE gas furnace | May 2026 |
| SL297UH080NV48CSL297V | 97.5% AFUE gas furnace | May 2026 |
| SL297UH080NV60CSL297V | 97.5% AFUE gas furnace | May 2026 |
| SLP99DF070XV36B | 97.5% AFUE modulating gas furnace | May 2026 |
| SLP99DF090XV36C | 97.5% AFUE modulating gas furnace | May 2026 |
| SLP99DF090XV48C | 97.5% AFUE modulating gas furnace | May 2026 |
| SLP99DF090XV60C | 97.5% AFUE modulating gas furnace | May 2026 |
| SLP99DF110XV60C | 97.5% AFUE modulating gas furnace | May 2026 |
| SLP99UH070XV36B | 98.1% AFUE modulating gas furnace | May 2026 |
| SLP99UH090XV36C | 98.1% AFUE modulating gas furnace | May 2026 |
| SLP99UH090XV48C | 98.2% AFUE modulating gas furnace | May 2026 |
| SLP99UH090XV60C | 99% AFUE modulating gas furnace | May 2026 |
| SLP99UH110XV60C | 98.1% AFUE modulating gas furnace | May 2026 |
| SLP99UH135XV60D | 98.4% AFUE modulating gas furnace | May 2026 |