The following spare parts are available for the model number R40 G20 (90 - 100):
Burners
Controls
| Part name | Also known as |
| 30-01-156 - G5/10/20 530 Se Control Box | G5/10/20 530 Se controller, G5/10/20 530 Se ignition controller, G5/10/20 530 Se electronic controller, G5/10/20 530 Se auto ignition controller, G5/10/20 530 Se main burner relay |
Dampers
| Part name | Also known as |
| 3000880 - G20 Air Flap | |
| 3007206 - G20 Air Damper |
Gas Valves
| Part name | Also known as |
| 30-02-279 - G5/10/20 Solenoid Coil |
Other Heater Components
| Part name | Also known as |
| 20031996 - G5/10/20 Oil Pump | |
| 30-02-280 - G5/10/20 Photocell | |
| 30-06-911 - G5/10/20 Hydraulic Jack/Ram | |
| 3002919 - G20 Electrode Assembly |