The following spare parts are available for the model number HN40 (150):
Burners
| Part name | Also known as |
| 29-99-445 - Gs5 Gas Burner and Train | |
| 29-99-452 - Oil Burner R40G5 On/Off 28 and 35 Sec | |
| 30-05-787 - Rg1Rkd Burner Gasket | |
| 31-28-080 - Burner/Pressure Relief Gasket |
Connectors
| Part name | Also known as |
| 31-28-115 - Fluebox Cover Assembly |
Controls
Electrical Components
| Part name | Also known as |
| 28-07-085 - MCB 10A 1 pole |
Fans & Motors Centrifugal
| Part name | Also known as |
| 28-09-049 - Motorised Fan Assembly DDC270-270 550W 1ph |
Filters
| Part name | Also known as |
| 29-15-017 - Oil Filter 18489P 1/4" Bsp |
Flue & Pipe
| Part name | Also known as |
| 31-28-078 - Painted Flue Stackbox Assembly |
Gas Valves
| Part name | Also known as |
| 28-30-102 - Lever Action Fire Valve | |
| 29-03-007 - Thermostatic Fire Cut Off Valve 3/8" 72 Degree C | |
| 3970569 - GS5 On/Off Gas Train Only (Includes Valve & Pipe) |
Heat Exchangers
| Part name | Also known as |
| 28-62-908 - Heat Exchanger Inspection Plate Gasket 25mm X 3mm |