Warm Air Central Heating
The flue path can be horizontal or vertical. For maximum equivalent flue lengths and flue size see tables. To calculate equivalent length refer to example below where:
| | 4" Flue (100mm/60mm) | | 5" Flue (125mm/80mm) |
| 45° bend = | 1m equivalent length | 45° bend = | 1.5m equivalent length |
| 90° bend = | 2m equivalent length | 90° bend = | 3m equivalent length |
| Terminal = | include at 0 | Terminal = | include at 0 |
| Flue Pipe = | include length of flue | Flue Pipe = | include length of flue |
| Heater | Flue Size | Equivalent Maximum Length Vertical or Horizontal |
| Economaire 25 | 4" | 12m |
| Economaire 31 | 4" | 12m |
| Economaire 32 | 4" | 12m |
| Economaire 50 | 4" | 12m |
| Economaire 65 | 5" | 18m |
| Economaire 90 | 5" | 18m |
| Horizontal Flue | Vertical Flue |
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| Click image for larger picture | Click image for larger picture |
