Cooling comparison

Fan vs. portable AC: which costs less to run?

Fans use very little power. Portable AC units usually use much more, which is why the monthly difference can be surprisingly large even when they cool the room for the same hours.

Open the prefilled comparison, then change wattage or runtime if your fan or AC behaves differently.

Open fan vs portable AC See portable AC guide

Same runtime comparison for a clean monthly gap
Useful for summer comfort and budget decisions
Easy to adjust for your own appliance labels

Example comparison

Fan 75 W vs portable AC 1400 W

Fan $2.52/mo

Portable AC $47.04/mo

Monthly gap $44.52

At the same 8 hour/day runtime, the portable AC costs about $534.24 more per year.

Why it matters

Light airflow is usually far cheaper than full cooling

Fans move air with very little electricity. Portable AC units have compressors and other components that pull much more power, which makes them more expensive to run.

Fan example: 75 W for room air movement.
Portable AC example: 1400 W for active cooling.
Same rate: makes the real monthly difference easy to see.

Best next step

Use the calculator to test your own cooling setup

If your fan or portable AC has a different wattage, just swap in the label value and WattWise will recalculate the monthly and yearly cost instantly.

Portable AC vs. window AC Compare two cooling units with the same room and runtime assumptions. Portable AC running cost guide Open the appliance-specific page with a prefilled estimate and FAQs.

FAQ

Quick fan and portable AC questions

Is a fan always cheaper to run than a portable AC?

Usually yes. Fans draw much less power, so even long runtime rarely reaches the cost of a portable AC.

Can I use my own wattage values?

Yes. Open the calculator and replace the starter numbers with the wattage listed on your fan and portable AC labels.

Does WattWise show the yearly difference?

Yes. The comparison mode shows the monthly gap and the implied yearly savings difference automatically.