| Model | Type | Fuel | Efficiency |
|---|---|---|---|
|
|
|||
| Grandee GCCF 15/23 | Condensing | Oil | 88.5% |
| Grandee GCCF 23/30 | Condensing | Oil | 88.1% |
| Grandee GCCW 15/22 | Condensing | Oil | 88.5% |
| Grandee GCCW 15/22 Ext | Condensing | Oil | 88.5% |
| Grandee GCCW 23/28 | Condensing | Oil | 88.1% |
| Grandee GCCW 23/28 Ext | Condensing | Oil | 88.1% |
| Grandee GCF 10-15 | Condensing | Oil | 89.5% |
| Grandee GCF 15/23 | Condensing | Oil | 90.2% |
| Grandee GCF 23/30 | Condensing | Oil | 89.8% |
| Grandee GCW 10-15 | Condensing | Oil | 89.5% |
| Grandee GCW 10-15 Ext | Condensing | Oil | 89.5% |
| Grandee GCW 15/22 | Condensing | Oil | 90.2% |
| Grandee GCW 15/22 Ext | Condensing | Oil | 90.2% |
| Grandee GCW 23/28 | Condensing | Oil | 89.8% |
| Grandee GCW 23/28 Ext | Condensing | Oil | 89.8% |
| Grandee GSCF 10-15 | Condensing | Oil | 89.5% |
| Grandee GSCF 15/23 | Condensing | Oil | 90.2% |
| Grandee GSCF 23/30 | Condensing | Oil | 89.8% |
| Grandee GSCW 10-15 | Condensing | Oil | 89.5% |
| Grandee GSCW 10-15 Ext | Condensing | Oil | 89.5% |
| Grandee GSCW 15/22 | Condensing | Oil | 90.2% |
| Grandee GSCW 15/22 Ext | Condensing | Oil | 90.2% |
| Grandee GSCW 23/28 | Condensing | Oil | 89.8% |
| Grandee GSCW 23/28 Ext | Condensing | Oil | 89.8% |
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