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| Efficient Fans |
|---|
| |
| A redesign of Ventilation Plants using more aeration blowers which cuts Coal use by 15% | |
| Tier 3 | |
| Unlocks | |
| Technologies | |
|---|---|
| Time | |
| Easy | 8 hours |
| Medium | 10 hours |
| Hard | 14 hours |
| Extreme | 16 hours |
| Cost | |
| Prerequisite | Ventilation Plant |
 Wood
|
40 |
 Steel
|
30 |
Efficient Fans is one of the Technologies in Frostpunk.