If your electricity bill worries you as much as the heat, the gap between an air cooler and an air conditioner is striking. Here's how their running costs compare and when the cheaper option is genuinely the smarter one.
Why air coolers are so cheap to run
An evaporative air cooler cools by evaporating water, a process that needs only two low-power parts: a fan to move air and a small pump to wet the pad. Neither draws much electricity, so a cooler's running cost is low — closer to a fan's than an air conditioner's. There's no compressor, which is the component that makes air conditioners power-hungry.
Why air conditioners cost more to run
An air conditioner actively refrigerates, and that means running a compressor whenever it's cooling. The compressor is the heavy electricity user, which is why an AC's running cost is many times an air cooler's for the same hours of use. You're paying more because the AC does more — it genuinely refrigerates and dehumidifies, rather than nudging the temperature down by a few degrees.
The honest trade-off
Lower running cost comes with lower cooling power:
| Air cooler | Air conditioner | |
|---|---|---|
| Running cost | Low | Much higher |
| Cooling power | A few degrees (dry heat) | Full, sealed-room cooling |
| Humidity performance | Weakens | Strong (also dehumidifies) |
| Exhaust hose | None | Required |
The cooler saves money and effort; the AC delivers more cooling for more electricity.
When the cheaper option wins
In dry heat, an air cooler is often the smart economic choice: it provides real, useful cooling for a fraction of an AC's running cost, with no hose to set up. For a living area on a dry afternoon, or anyone prioritising a low bill, it's excellent value. Lean on a fan on milder days and a cooler when you want a bit more, saving the AC for the worst heat.
When the AC's cost is justified
When the air is humid, when you need to properly cool a sealed bedroom to sleep, or when a few degrees just isn't enough, the air conditioner's higher running cost buys performance the cooler can't match. For those situations, paying more to run an AC is money well spent.
The takeaway
An air cooler runs for a fraction of an air conditioner's cost, which makes it the value pick for dry heat and budget-conscious cooling. Match the device to your weather and your bill tolerance — and if a cooler fits, check which air coolers are in stock near you.