Oxygen Diffusers- Do you put them at the bottom or top of your base?

[Seirith]

I have seen people say to put them at the top of the base ao that the air goes down and people who say to put them at the bottom because air rises. Does it matter where they are or is air flow more important as long as your are producing enough oxygen?

[Markus Reese]

Originally posted by Bokonon:

Originally posted by twistedmelon:

Separate comment cause saw after post. Dont use manual, they open/close slow and will still let stuff in and out as peeps go through. Use S traps like in a sink. Some will get out from pressure differential, but then can also dump waste gases outside end of the trap. Can use pressure sensors to normalize it. If outsides not above threshold and inside is? Pumps junk from in base to outside. Is a fantastic isolator.

I've never tried a S trap, I use liquid locks and don't have to worry about regulating pressure. Got a screenshot by any chance, I'd much prefer a dry way of sealing an area from gas intrusion.

Just did up one set here to show since have just started a new play for post launch and wanted to verify it works. Nothing fancy. I keep the heavy gases under positive pressure. If base goes low, it overflows back to bottom. If I dig, it just puts waste gases up into where am digging.

I have touched on water locks before myself, but they just feel too cheaty to me, plus now they all got to stop and kick the water off making them slower than a manual airlock. A side gate can do similar with just an up down up, That vertical return line isn't necessary, but helps when you don't have automation unlocked or still early on and need to go into gassy areas.

Main reason I do it isn't to keep oxygen in, it is to keep other stuff out. But it does keep the oxygen in too. The airlocks only work to a point unfortunately when just a door or when I get the suits, will run a doubledoor vacuum chamber. Once I get automation, I just put it on a sensor so that it pumps in more CO2 if it detectx oxygen.

https://steamcommunity.com/sharedfiles/filedetails/?id=1823545504

https://steamcommunity.com/sharedfiles/filedetails/?id=1823545557

[僕の名前 (仮)]

Some one top, some on down.

[MaxKool007]

Originally posted by twistedmelon:

First bit, up and down is a bad way to think for this discussion since it essentially is floats or sinks if considered correctly.

So diffusers, I try to keep near critical buildings such as dinner and especially sleeping.

Because it all displaces, I prefer to try and keep it in the areas critical. If you let it bubble, it can "splash" The gases around keeping masses matched. Remember, two different elements cannot occupy same space. If you bubble, a small mass of gas/liquid will displace a large mass as it bubbles. This is a big issue with the oxyferns. Place oxyfern on level you want to be bottom of of O2 so it doesnt bubble the CO2 as bad.

So think in layers. Use bowls, caps and pits to layer out. Keep stuff where you want it. Hydrogen layers, oxygen layer, chlorine layer, etc. Stuff that outputs, always have it output to that layer area. Later use sensors and pumps to control and clear the contamination.

Ok please don’t use multiple diffusers. A well designed base can run on a single for basic air generation and have zero issues.
They give off a decent amount of heat and that’s why we generally move oxygen generation outside the base and into a contained box.
If you are running out of algae you are sticking with it for to long and need to swap to water based air gen.

As for the OP a single one one the middle of the base, sitting next to your main shaft and with proper airflow tile usage will fill a whole base no problems . In most of my games
I start venting o2 into space as I have so much but need hydrogen for rockets.

[Defektiv]

Early on I find myself putting diffusers on the outside edges with airflow tiles in the middle so it pushes all the co2 down into a scrubber pit. Later as I'm switching to electrolyzers I tend to do the opposite and pump o2 centrally, collecting other gases at the corners of the base.

[Astasia]

Both. I put two in opposite corners, the top one pushes CO2 down faster, the bottom one pushes the CO2 off to the other side, this compresses the CO2 into one corner where it either falls down a pit and out of my base, or gets pumped somewhere else. The top one isn't as important, CO2 will fall on it's own eventually, the bottom one feels pretty useful as it prevents the entire bottom layer of my base from being unbreathable. Having more than you need is fine, if they pressure cap they turn off, so it's not like you are wasting anything.

[Talo]

put it in a sealed room and pump the air via vents

[fluxtorrent]

usually the first is central. if I bother with a second it goes wherever it ends up being needed at that moment depending on how ive built. usually just below the centerline as well though

[Bokonon]

Originally posted by twistedmelon:

Posted screenshots I asked for

Thanks a bunch twistedmelon, I appreciate it!! Looks interesting, going to have to play with them on my debug map before I try it on my current playthrough. A lot bigger than the liquid locks but also a lot drier.

[John Hadley]

I put oxygen diffusers as close to where my duplicants are working as possible. That makes it faster for them to feed it algae when it needs it. I dont want them to be at the top or the bottom. I generally want them to be in the middle because then the oxygen can flow to more of the base without needing to run gas pumps.

If I'm making oxygen with electrolyzers then I tend to put them near the top because the hydrogen produced while producing the oxygen floats up so its convenient to have the hydrogen generators at the top and I won't have to run the wires as far if the electrolyzers are also up close to the top.

[fractalgem]

I honestly haven't had any problems with oxygen getting where it needs to go...however, I also made absolutely sure I didn't have co2 building up in major areas*. You really won't have issues with oxygen if you imagine co2 as sinking, and ensure it always has a good route to get to an algae terrarium.

Admittedly, I also have a lot of o2 pressure-typically 1000 to 2000 even in areas far from my main base.

*except the mushroom farm and food storage, which were specifically designed to trap co2.

[andy-scull]

I actually build only one of them as I very rarely print dupes and usually go into electrolyzers era with 4-6 dupes. It just sits in the center of the base and is constantly on until I start producing oxygen from geyser/ice biome, then the diffuser is connected to gas pressure sensor and turned off (turn on if pressure <700)

[僕の名前 (仮)]

Everywhere, polluted oxygen and oxygen dont form layers like other gasses, I didnt notice at least.

[Markus Reese]

Polluted o2 does as well. Just the mass difference is limited do it tends to do it slower. Is heavier than oxygen.

[Angpaur]

Forming the layers of gases/liquids depends on its molar mass property.
O2 and PO2 have same molar mass in ONI, so polluted oxygen is not heavier than oxygen.

[Markus Reese]

Originally posted by Angpaur:

Forming the layers of gases/liquids depends on its molar mass property.
O2 and PO2 have same molar mass in ONI, so polluted oxygen is not heavier than oxygen.

Still layers out though. I make use of that for my Puft air treatment centers. Polluted always settles below O2 in my bases.