Kind of simpler and more humane would be to find the intakes and install oxygen concentrators – backwards. The inhabitants will simply pass out peacefully and not come to again.
Nah, in this case you want them to come out with the contents intact for the taking.
Or do eschereal’s alternative, but the sealing off is probably more practical in most foreseeable situations where they would be running for their lairs.
And/or sealed up tight, so all those air vents are plugged.
I think the people building these things think that either they’re only going to have to use them for a short time, or that there won’t be anybody outside who’s in any shape to plug their air vents. What they expect to come out to later, if the latter, is not clear to me. If the intention is to survive a wildfire in a specific area with society elsewhere continuing as normal, or a brief attack that gets repulsed (or is being carried out by one’s allies), the former might make some sense. But I think in general these things won’t work out like the bunkerites think they will.
“Elon, things are terrible on the surface; fires, plagues, starvation! Save yourself! For God’s sake, stay in your bunker! Don’t come out. Don’t come out!”
A man boarded an 80-foot fishing boat moored in coastal Washington, woke up the crew, and told them he was the captain and they needed to get underway right away.
The crew began to suspect something was amiss when the “captain” started talking about meeting a Chinese mothership, and turned around, whereafter he was arrested at port and found to be in possession of $4000 cash and a large quantity of marijuana packaged for individual distribution (in a state where the stuff is legal and can be bought at a store, no less).
It was apparently his second attempt that day at grand theft boat.
This may be described as “myopic foresight”. I can clearly see the future, but I cannot actually discern what I am looking at. But, at least my gigabytes of dogecoin will be secure.