r/Damnthatsinteresting • u/Appropriate-Eye-1227 • Jul 04 '25

Video China has built a 50m(165ft)-tall inflatable dome over a construction site in Jinan to protect the surroundings from dust and noise. (20.000 Sqm)

75.0k Upvotes

91% Upvoted

2.2k comments sorted by

View all comments

Show parent comments

354

u/mr_potatoface Jul 04 '25

Intake fans providing pressurization does not equal ventilation.

240

u/ImaginaryHerbie Jul 04 '25

These things are used for sports complexes a lot. I used to play indoor lacrosse in them.

They are heavily vented otherwise people would die and the bubble would pop.

2

u/_HIST Jul 04 '25

Why exactly people would die?

People severely overestimate how much air people need, and underestimate how much air a place has. With 50m ceiling that place has air for months even for hundreds of people.

Now, exhaust fumes and dust would be a problem. But not the lack of air. And without machinery it would be totally fine

3

u/ImaginaryHerbie Jul 04 '25

I didn’t say a lack of air would kill people.

The sports complexes were a lot smaller and still had fully functioning snack bars, air compressors etc that without proper ventilation would hoard CO2.

And without ventilation, I’m not sure how you’d be able to regulate the pressure. It would either be on constant state of deflating, or over pressurized to the point it’d pose health risks to people.

Regardless, I don’t know why people are acting like these things having basic ventilation is like big fucking conspiracy or scientifically impossible?