The following spare parts are available for the model number OUHA90 (300):
Burners
| Part name | Also known as |
| 30-05-813 - Rg3D Tc, Rg4D Tc and Rg5D Tc Burner Gasket | |
| 31-40-156 - Burner/Pressure Relief Gasket |
Electrical Components
| Part name | Also known as |
| 28-07-085 - MCB 10A 1 pole |
Fans & Motors Axial/Main
| Part name | Also known as |
| 28-09-007 - Axial Fan Assembly | main fan Assembly, centrifugal fan / motor assembly Assembly |
| 28-09-092 - Axial Fan Assembly | main fan Assembly, centrifugal fan / motor assembly Assembly |
| UDSA0127011 - Axial Fan Assembly | main fan Assembly, centrifugal fan / motor assembly Assembly |
Filters
| Part name | Also known as |
| 29-15-017 - Oil Filter 18489P 1/4" Bsp |
Gas Valves
| Part name | Also known as |
| 29-03-007 - Thermostatic Fire Cut Off Valve 3/8" 72 Degree C |
Heat Exchangers
| Part name | Also known as |
| 28-62-908 - Heat Exchanger Inspection Plate Gasket 25mm X 3mm | |
| 33-65-079 - M/S Combustion Chamber/Heat Exchanger (2006 Onwards) |