Guarantee Lengths you can offer
The below Guarantee offering is available on Greenstar gas and oil fired boilers.
| Range | Standard Guarantee | Greenstar System Filter |
| Greenstar i | 7 Years | 8 Years |
| Greenstar Ri | 7 Years | 8 Years |
| Greenstar Si | 7 Years | 8 Years |
| Greenstar CDi | 7 Years | 8 Years |
| Greenstar 8000 Life | 8 Years | 10 Years |
| Greenstar 8000 Style | 8 Years | 10 Years |
| Worcester 2000 | 5 Years | 6 Years |
Range |
Standard Guarantee |
Greenstar System Filter |
| Greenstar Oil Range | 2 Years | 5 Years |