Grandaire Furnace Manuals
Select your Grandaire model number below for installation steps, settings, maintenance schedules, troubleshooting and the full specification sheet. Your model number is printed on the rating plate.
Grandaire furnaces by model number
| Model | Description | Certified |
|---|---|---|
| WFJT060B048A | 97% AFUE gas furnace | August 2026 |
| WFJT060B048A*D | 95% AFUE gas furnace | August 2026 |
| WFJT060B048A*H | 96.3% AFUE gas furnace | August 2026 |
| WFJT080B048A | 97% AFUE gas furnace | August 2026 |
| WFJT080B048A*D | 95% AFUE gas furnace | August 2026 |
| WFJT080B048A*H | 96.2% AFUE gas furnace | August 2026 |
| WFJT100C060A | 97% AFUE gas furnace | July 2026 |
| WFJT100C060A*D | 95% AFUE gas furnace | August 2026 |
| WFJT100C060A*H | 96.1% AFUE gas furnace | August 2026 |
| WFST040A030A | 96% AFUE gas furnace | July 2026 |
| WFST040A030A*D | 95% AFUE gas furnace | July 2026 |
| WFST060B048A | 96.3% AFUE gas furnace | August 2026 |
| WFST060B048A*D | 95% AFUE gas furnace | August 2026 |
| WFST080B048A | 96.2% AFUE gas furnace | August 2026 |
| WFST080B048A*D | 95% AFUE gas furnace | August 2026 |
| WFST100C060A | 96.1% AFUE gas furnace | August 2026 |
| WFST100C060A*D | 95% AFUE gas furnace | July 2026 |
| WFSU040B036B | 95% AFUE gas furnace | July 2026 |
| WFSU060B048B | 95% AFUE gas furnace | August 2026 |
| WFSU080C060B | 95% AFUE gas furnace | August 2026 |
| WFSU100C060B | 95% AFUE gas furnace | July 2026 |
| WFSX040A030B | 96% AFUE gas furnace | August 2026 |
| WFSX040A030B*D | 95% AFUE gas furnace | August 2026 |
| WFSX060B048B | 97% AFUE gas furnace | August 2026 |
| WFSX060B048B*D | 95% AFUE gas furnace | August 2026 |
| WFSX080B048B | 97% AFUE gas furnace | August 2026 |
| WFSX080B048B*D | 95% AFUE gas furnace | August 2026 |
| WFSX100C060B | 96.3% AFUE gas furnace | July 2026 |
| WFSX100C060B*D | 95% AFUE gas furnace | August 2026 |
| WFSX120D066B | 96.1% AFUE gas furnace | July 2026 |
| WFSX120D066B*D | 95% AFUE gas furnace | August 2026 |