Portable Fan (Box or Pedestal) vs Air Conditioner (Window Unit): Which Costs More to Run? (2026)
A fan uses 20 to 30 times less electricity than a window air conditioner, but it cannot lower the room temperature. In dry heat or mild summers, a fan alone is enough. In humid heat, the AC is the only thing that works, and the cheapest strategy is to run both: the fan lets you set the AC a few degrees higher.
At the hours shown, Portable Fan (Box or Pedestal) costs about $26.28 per year and Air Conditioner (Window Unit) about $525.60 in United States (average).
| Appliance | Typical watts | Hours / day | Per hour | Per month | Per year |
|---|---|---|---|---|---|
| Portable Fan (Box or Pedestal) | 50 W | $0.009 | $2.16 | $26.28 | |
| Air Conditioner (Window Unit) | 1,000 W | $0.18 | $43.20 | $525.60 |
Edit the hours to match your own use. Costs use the typical wattage of each appliance.
When the portable fan (box or pedestal) makes sense
- The room is below about 30 C
- Humidity is low
- You want the cheapest relief
When the air conditioner (window unit) makes sense
- It is hot and humid
- Someone in the home is vulnerable to heat
- You need to cool the room, not just yourself
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