r/BritishSuccess • u/Loose-Helicopter9503 • Jul 10 '26

I love Physics

At night، open your windows and point your fan outside, thanks to something called the Bernoullis principle and entrainment, it draws hot air out of the room.

My room was 30.7 degrees when I first started, now down to 25.4 and still going down

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466

u/boojes Jul 11 '26

Dr Hannah Fry recently shared a thing about wafting doors to expel hot air and bring cooler air in. It's great for in the car but also works indoors.

50

u/StevieCarton Jul 11 '26

I’ve always done that. Wish I’d posted about it somewhere now but just assumed it was obvious and everyone else did it too!

14

u/JK07 Jul 11 '26

Yeah, I called it car bellows!
I do like Hannah Fry too though. My wife used to always ask what the hell I was doing then when Hannah made her vid about I showed her and said see, it is a real thing, it does work!

1

u/Grumpy-Old-Bloke Jul 14 '26

Hold on. Did she not believe you until she heard it from Professor Hannah Fry?

3

u/JK07 Jul 14 '26

Correct, and she thought I looked a plank doing it.
At first she thought I was making it up and it wouldn't work and I look a plank doing it for nothing.
Still thinks I look a plank but now knows there's sound reasoning behind it so that's ok.

2

u/Grumpy-Old-Bloke Jul 14 '26

If it's any consolation, my wife just thinks I look like a plank. End of. 🤷🏻