this post was submitted on 21 Aug 2026
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Nope. Most room fans are 75W or less, that isn't much power and the heat generated from a fan is negligible compared to the cooling effect of moving air.
Are you a bot?
Edit: A person produces 100W of heat at rest. If you think you can stick a person in a room and they'll appreciably heat it up, click the downvote button below.
No? Why would I be a bot?
75W is a lot of heat to be pumping out all the time. In a closed room that can heat it up a lot. Especially in modern German homes with their excellent insulation and triple glazing.
And larger fans can easily go up around 100W or more. Sure it isn't a lot compared to a 3000W space heater. But it isn't exactly nothing either. And given it would be running for a long time, that energy adds up.
75W is not a lot of heat. The average human produces about 100W at rest. So you're essentially claiming:
"Putting one person in a room, at rest, will heat it up a lot."
Sources: https://ergo.human.cornell.edu/studentdownloads/DEA3500notes/Thermal/thcondnotes.html
https://www.sciencedirect.com/topics/engineering/metabolic-heat-production
Except it doesn't because heat transfers out of a room over time, even through walls and triple glazed windows.
Time to give your receipts, bot.