It’s not just the heat from the fan that keeps the room cool, either.
You’re also using your space to pump up the energy in your home, so you’re using less energy than you’d use in your normal home.
If you don’t have a ceiling fan, the energy you’re putting into your home comes from the lights, the air conditioning, and your computer’s fan.
The energy from the light bulb is used to heat the air in your room, and that heat is then used to drive the fan to keep the room from freezing.
As a result, your room will be cooling even when you don.
This article originally appeared on TechCrunch.