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Tip: Save energy with a fan

26 May 2026

Did you know that an electric fan uses less electricity than air conditioning? Twenty times less! And the climate impact of a fan is much lower because it doesn’t contain any coolant. Aircon cools inside but moves heat outside whereas the airflow from a fan makes you feel cooler without cooling the air. 

Reason therefore to choose a fan rather than a portable air conditioner if you are in a building that doesn’t have a central air conditioning system.

Are you energy smart?

Leiden University is doing all it can to save energy. You’ll find more information about our energy campaign along with energy-saving tips on the staff website. Want to connect with colleagues who are committed to a sustainable university? Join the sustainability network in Teams!

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