The following spare parts are available for the model number R4500:
Controls
| Part name | Also known as |
| 28-16-029 - Thermostat WTR010 |
Fans & Motors Axial/Main
| Part name | Also known as |
| 28-09-063 - Axial Fan & Motor Assembly c/w Cage Guard ("Solar & Palau") | main fan & Motor Assembly c/w Cage Guard ("Solar & Palau"), centrifugal fan / motor assembly & Motor Assembly c/w Cage Guard ("Solar & Palau") |