Self-Powered Oxygen Machine Tutorial (SPOM) | Oxygen Not Included 

The greatest tutorials ever spend their time explaining WHY, rather than just showing you the finished product. The first quarter of this video has helped me so much already

The small 1 kg or less polluted water packets running between the water tanks in that final 10 electrolyzers monstruosity: "I'm gonna ruin these generators whole carrier"

i was having problems really understanding spoms and this video came at the perfect time. i love how thorough you are never stop what u r doing. ty

I don't know how you did it, but I watched the entire 37 minutes of content without pause because it was just so good. I've honestly never watched an informative RU-vid video that is this long without pausing before. This is impressive. Currently I have 132 hours in oni.

Best SPOM tutorial. Building different SPOMs starting with the simplest one helps a lot.

Thank you for the slow, methodical explanations! I'm bad at the whole math and logistics side of things in this game, even though its one of my favorites. Thank you so much for saying it in a way I can understand.

Literally what I just needed and posted a min ago by my favorite oni creator, huge

opened youtube with the intention of looking up a SPOM tutorial, and boom, there this was on my recommended page. thank you for the timely assistance! :D

Was able to get this up and running in my base next to my water plant. Also ran the cooling through an ice biome, currently working on getting some domestic Wheezewort in there to help maintain temp. Thank you so much!

THANK YOU !!! I discovered ONI one month ago, and soon enough I've been overheating with all the features. I feel your channel as a gift to enter the real game, understanding the mechanics, the maths, and making my own experiments. You take the time to explain everything, especially what we need to pay attention to, with a touch of ONI humor I think. I might have to watch them several times to get it, but each time I'm able to absorb more info. Thank you so much !

need to watch more of ur vids. love how much detail u go into. this game starts to make my head spin when i go beyond anything basic

Thanks for the detailed explanations I have always had issues setting these up this made it easier.

Something I did with my SPOM is I built it close enough to a cold zone and ran my output pipes through that. I had to tinker with it to get it just right, because I was initially getting oxygen at my base at a chilly three degrees Fahrenheit, but once I found the sweet spot I was getting perfectly temped O2 at my base.

as always Echo to the rescue with another ONI tutorial, exceptional as always, even if there was debris in one of the builds LOL

This man goes deep! Love the video, exactly the info I needed!

Holy Rodriguez on steroids, Batman!! ... That was a fun series. XD Good stuff. Tyfs! Best of wishes to you and yours.

Funny thing about SPOMs is that while they do generate a lot of heat, destroying with aquatuner and steam turbines takes a lot less energy than just pumping the oxygen. So another approach would be to build electrolyzers all over your base, to collect the hydrogen at the top of the base and to counter the heat with a normal cooling loop that runs through your whole base. This way, you only need to pump hydrogen and you end up with a lot more excess energy. Gas mixing isn't great for your FPS though.

the best guide for electrolyzes that i have seen! Thanks Echo!

I love this tutorial, I learnt a lot! Thank you

Intresting thing to keep in mind is that in the base version of the game using the neural vaccilator can give you a trait called deep divers lungs which reduces the oxygen intake, basically doubling the max number of dupes these systems can support. And the neural vaccilator can be recharged late game!

There's also from Nathan's Sandbox using only 3 gass pumps and 1 electrolizer and is very compact, I'm using it now and it's even giving me more hydrogen enough to feed an anti-entropy and a little bit extra for another hydrogen generator.

Good morning Echo! Thanks for another helpful video, and another appearance from Buffer Knight!

Great video! I just saw someone on the Facebook group ask about this so great timing!

you are the greatest teacher! thank you for these!

This helped me alot in my colony and was the first spom I ever built

I think you single handedly got me back into Oni

Since I am 600 hours into ONI now, I figured it was time to watch a SPOM tutorial finally. Putting my new skills to the test tonight! Thanks for another fun and informative video! :)

I really like that your guide does more than just "put the wire here, because I said so." You actually gave us TOOLS to make our own setups and explained WHY the Rodriguez is set up the way it is (and you even gave some lore!) Keep up the great work, we all appreciate how much effort you put into these videos.

I'll just note that input water can generally be used to keep the whole system outputting gasses at reasonable temps. If you snake the input water pipes around the pumps and electrolyzers (even with normal pipes at lower throughputs) you can generally keep the setup and output gasses at temps only moderately higher than the input water temp. Thus, cold input water can equal cold output oxygen.

Watched over the video a few times to get the whole idea into my head. Now I want to make an oxygen machine with only 9 electrolyzers but all the rest of the stats about the same as yours. The gods have shown me magic numbers after I memorized your notes.

I love these videos, it feels oddly nice to have someone explain in depth about this stuff instead of being like "put all of this together and then you this thing, bye"

Little late to watching this one, but always enjot the videos man! hopefully the new PC is treating you nicely! Won't have all my parts until mid march.

NIce tutorial. A little nitpick. @29:30 you save cooling by NOT insulating the water, actually making the pipe radiant, if your water is below 70°C. 25°C water would actually cool down the oxygen enough that you don't need extra cooling. Just move the pipe down in the O2 chamber, as there's not need to cool down the hydrogen, and make it radiant. Even if O2 comes out at 70°C, water is flowing at about 4kg/s and oxygen at about 3kg/s. Water SHC is more than 4 times than oxygen. If heat transfer were perfect (like long thermium radiant pipe), the equilibrium woudl be reached at about 32°C, that's the temperature of the water entering the electrolizers and of the O2 exiting the system with perfect heat exchange. In a less perfect world, O2 is going to exit they system at about 35°C. Whether that's cold enough for your base or not, it depends on external factors, but for sure it takes less to cool it down compared to 70°C oxygen. In general, there's not need to insulate the water input because: - if water is below 70°C, raising its temperature has no negative effect, only the positive effect of destroying heat (the H2 and the O2 are at 70°C not matter what - so destroying water at 32°C destroys more heat than destroying water at 25°C); - if water is above 70°C, so will be the outputs: there will barely be any thermal transfer, since they are all at the same temperature - so no need for insulated liquid pipes. If water is cold or lukewarm, you can use it to cool down the generators too, allowing you to use standard materials (not golden amalgam or steel) for the whole build. It's just that in ONI source of water at 25°C are quite rare. Most water comes at 95°C out of the geyser or a steam turbine that tames a steam vent. That's why most people build Rodriguez's that are capable of taking in 95°C water. IIRC, there are only 3 types of geysers, cold salt water (or brine, I dont' remember), cool slush and 30° polluted water, that can be fed to a Rodriguez and used to cool it down. Water coming out of cold petroleum generators is at 40°C, which sets the operating temperature of the SPOM (and of the oxygnen it produces) around 50° - 55°C, again duable depending on your base (e.g. both duos and stone hatches are fine - most crops aren't).

I've watched this video several times now, I've even made myself some diagrams to keep at hand and I just want to thank you for making this tutorial slash guide. Now I need to study up on aquatuners and steam power generators so I can cool all that beautiful oxygen before it gets dumped into my base. Great video, thanks again.

I have some hints for starting up these systems that mostly use the idea of building all the pipes and wires with breaks in them that you can later connect without actually having to build anything. For example if you build two wires next to each other as dots, you can later go back into the build wire menu and connect the wires and they instantly connect without any dupe work as long as they are all the same materials. Even if they are different materials they will instantly connect, you will just then need to cancel the build that would swap out the material. So using that idea, first route the hydrogen so that it runs down first, with an output between the bottom sensors that run the oxygen pumps. Then leave a break in the pipe before going up to the hydrogen generators. Once primed you can deconstruct this output and gas pipes from the bottom row where the oxygen pumps are and you won't disturb the primed hydrogen pump. This let's you prime the hydrogen pump area without using a tank because any hydrogen will just float back to the top especially if you use my next suggestion. I never connect all the wires to the oxidizers or pumps. Instead I build all the wire runs with breaks in them and single dot wires on the oxidizer or pump plug sockets. Then I can connect them as described above, one at a time. So if you connect just the left and right edge oxidizers, the hydrogen pump, and the left and right edge oxygen pumps, with the atmo sensors set to run full out, you will use less power to prime the system, AND it will prime surprisingly fast because the hydrogen gets used over and over again until it is primed. Using only the edge pumps there is little chance of sucking out the hydrogen before it goes back to the top. Once primed, deconstruct the hydrogen output from the bottom, then seal the last entrance, then connect all the wires to all the pumps and oxidizers using the zero dupe labor trick I described. And finally sett the end state atmo sensor limits. I think you will find this method primes things so much faster, without all the loose hydrogen, or having to build and destroy gas tanks.

the full rodriguez power can be connect to direly using heavy volt join plat and heavy volt wire and u can leave the 2 large transformer to power other thing in your base. i also like to induce a infinite gas storage to catch the overflow hydrogen and use it to power other stuff or just store it for a later date.

This is great! Between this and your aquatuner tutorial, I will finally be able to progress beyond 200 cycles. Thank you very much!

Thank you so much Echo!

Running radiant pipes in your spom will convert the temp to the water feed temp. Not necessarily needed but makes the electrolyzer eat the heat for you. Takes the same space as the same spom just a little more resources. Works great with a cool slush/brine/saltwater > refinery> spom poof 15° o2

Hey, I found a great way to ensure that only the right gas makes it to any system. Its a gas pipe element sensor attached to a vent via a not gate. Set the sensor to the element you want in the system and it will vent any other gas it detects. I call it my gas excluder. A more basic version also works for sorting gases; just pump all the gases though the same line and put an gas pipe element sensor attached to a vent in the each gas storage. Dunno if you'll see this, but I was just setting up a SPOM and thought of this while watching. Love your videos

Very nice explanations. I would have included some glitchy uses of electrolyzers, like stacking 500g of 2 liquids onto the electrolyzer making it produce seperated O2 and H2 regardless of gas pressure. this can be used in the early game (1 elecrolyzer in the middle of your base and siphoning the H2 from the top to generate guite a bit of electricity) and in the lategame (creating reservoirs of 3000 kgO2(orH2)/tile so you have more leeway when a system inevitably fails for some reason.

very thankful for this excellent tutorial, i have over 600hrs in ONI and still found this helpfull

I just made my first fullsize Rodriguez with cooling via steam turbine today! Thank u so much for your video! There are a lot of ONI RU-vidr out there but for the most of them I'm just to stupid 😂 I always was very bad with maths and physics and stuff in school. But you can explain this and I understand it! Thank u! Greetings from Germany 👋

great explanation. Although, you have forgotten to mention the most important key factor. Only one gas type can exist in the tile. This is why the 'entrance' to your hydrogen pump section are only one tile. Once hydrogen gets there it will not allow oxygen to go through acting as a no power filter making it possible for these systems to be net positive on the energy front

Great tutorial, very informal, and I hope to build one soon. However, my brain hurts with all information!!

I was hoping to see the "Hydra" type of SPOM, where it's vertical and infinitely stackable design with included infinite storage for both gasses. That would solve any over supply of whatever gas you need. But it is using submerged electrolisers in 2 liquids, which you breefly mentioned as "glitchy", which you are not a fan of. I am planing on building that one, next opportunity I get.

Another one I like is the "3/4" Rodriguez, with 3 electrolyzers and 5 pumps. Fits together nicely in terms of tiles, you have to make it non-symmetrical but ok. You get 2 full pipes and one 500g pipe, which works great as a "top-up" line to fill the other two after a split-off to atmo-suits, oxylite, etc. The electrolyzers theoretically produce 2.55 kg, so the electrolyzer throughout almost exactly matches the gas pump throughput. But the best part: less than 2 kW, no transformers. Super easy to plug into your main grid in the late-game when you want the hydrogen for rocket fuel instead of power.

I wasnt quite sure why I couldn't get a SPOM to support itself. The two keys for me was, first, knowing that you have to bootstrap the system to the point of "equilibrium" as you kept saying. And second, it seems to obvious now, but if you simply do the numbers like you showed here, it becomes obvious that it will work just by doing the math alone. Good video, very satisfying to a logic/engineer type of person

I LOVE THX SO MUCH!!!

i have had problems making spoms forever and now my oxygen production will finally be stable!

Great video for beginners

thanks you i was looking for a non exploity way of doing a SPOM

For my mini-SPOM, I kind of cheat and use one set of mechanical filters per pump primed with H2 (with the initial help of a traditional filter). Once the O2 is passing, then the output pipes are merged. The O2 is later cooled with a thermoregulator (outside the SPOM power grid), which in turn is cooled with the incoming H2O pile fed into the electrolizer. So far it runs for hundreds of cycles. The overflow pipes fed into my infinite gas storage system. Nothing is wasted. 🙂

YOU ARE FREACKING GENIUS!

To reach equilibrium I like to place a Signal Switch on top of the opposite Airlock door from the Atmosensor, which when activated opens the two Airlock doors and stops the hydrogen Airpump utilizing a Not Gate. Keep the doors open until the top row of the Electrolyzers are covered in hydrogen.

Love the video. Helped me just in time. Though I used that smaller version. The 12 tile wide design. Hydrogen keeps getting into my base. Is my base just too big?

23:06 I actually made a bit of a mistake on my own LP with these airlocks. I was running the uninsulated oxygen pipes right past them, so all the work I put into cooling them down was absolutely wasted. The problem with having built it at the bottom of the world. Fortunately, I left enough space on either side that I could just install some extra insulated tiles and be done with it.

Instead of deconstructing the full gas reservoir at 31:41 I connect it to a pipe. The gases inside the reservoir will come out alternating between the different gases so every second blob will be hydrogen. You could work with pliers to seperate them all without power, but I just throw a powered gas filter. Also when starting the spom I like to let the hydrogen gather a bit more so I can hit equilibrium faster. Instead of transformers and heavy watt wire I split the power grid of a full Rodriguez to two. That way you use less metal. I remember doing some calculations for the cooling some time ago and came to the conclusion(99% sure) that with supercoolant aquatuner/steam turbine you can cool the oxygen with the excess hydrogen. That system will need a bigger buffer for the hydrogen and automation to not waste steam turbine power, but its possible.

FJ found on his last run that you actually get closer to max throughput if you drop the hydrogen pump down a tile and flatten the roof.

Thank You for this guide! You forgot the submerged SPOM.😉

disabeling the hydrogen pump during startup untill the top half of the spom is filled with hydrogen makes it way faster - after that you only have to pump out 2 tiles of not-hydrogen underneath the pump which - depending on the pressure - will take only a few pumps to clear out

I love your videos

Wow I can't believe I couldn't figure this out myself ;-)

You say 'total throughput' at one point about the 'full Rodriguez' where you should really say 'maximum throughput' (or equivalent) to clarify to and/or remind people that it's still limited by the incoming water flow being sufficiently maintained, and oxygen actually able to be pushed through constantly with no blockages down the line.

thank you

Have you seen brothgars videos? I remember him making a similar system way back when ONI was an early access.

4:24 is is posible to build a spom with a gas filter, you just need to bunch up the packets in the pipe correctly. You do not want the small hydrogen packets to pass though the gas filter as it is a waste of power. My early game spom uses a gas filter because it is easy to prime compared to other solutions, and never needs extra power after, even after like 100 cycles

Yooo, the advice to insulate the inbound water is backwards. If the water comes in below the output temp of 70°C that means that you're giving up free potential cooling. All water between 0c and 70c produce 70c gas from the electrolyzer, so if the water is below 70c then you could use that water to bring the gas temperature down. As long as the input source is under 70c, it's better to transfer heat into that water.

i know this is vanilla but if you go to the steam workshop, theres a advanced electrolizer where the gases are outputted through pipes already so no reasons for the air pumps

If you’re tight on refined metals 3 small transformers works just as well. For the power hookup I like 3 gas pumps + 2 electrolyzers / 4 gas pumps / 2 electrolyzers + water feeders (if close by).

nice video, what do you think about new hydra SPOMs?

I'm trying to understand if there's a particular reason that the full volume of gases from the electrolizers can be pulled out in the half-Rodriguez, but no one adds an 7th o2 pump at the bottom to do so in the full-Rodriguez. For that matter, I'm also wondering why with the excess power available, no one just includes filters on their outputs just in case.

The full rodriguez doesn't need two large power transformers. It can instead run on three small/regular power transformers, with the two left electrolyzers on one circuit, the middle two electrolyzers and the hydrogen pump on another, and the right two electrolyers on the third circuit. Each circuit consumes 720 watts of power. That's enough to run a water sieve on one circuit, and two liquid pumps on the other two circuits. If a desalinator is used, that's when you need to either use a large power transformer, or use the excess hydrogen to power the desalinator. A full rodriguez can power all of the oxygen AND all atmosuit docks for duplicants who wear them other than when sleeping (and still have some excess hydrogen left over). Finally, if you're running liquid radiant pipes made out of copper over the gas pumps (I recommend cooling the oxygen pumps first, and then cooling the hydrogen pump also), with water coming from a polluted water vent or cooler (duplicant pee will even work for some of the input liquid), there is NO NEED to use insulated tiles around the system. In fact, all those insulated tiles slow down the building process. Instead, with input fluid from a polluted water vent or cooler (coming in through insulated liquid pipes probably made out of igneous rock), since the system isn't producing bunches of heat, you may as well make the tiles around the chamber out of something better looking and quicker to build. Like granite.

I actually heard you should be cooling a bit with the incoming water (assuming your source is cooler than 80 degrees) because water takes more thermal energy to get hotter than oxygen or hydrogen. So cooling with the water coming in is a heat deleting system.

Very nicely done. Could use bookmarks in the description.

Could you use 2 pumps and gas shutoff valves to achieve the same effect as the small one with less power?

Surprised you didn’t cover the submerged version, but considering just how much that changes the SPOM it’s probably for the best.

You're doing god's work. ;) +1 Subscriber. =D

I'm personally a fan of power free filters, made from bridges, a valve, and a loop of 1g gas.

My first thought upon seeing the Full Rodriguez was to "simply" add another gas pump to get the full 3500 g/s of oxygen out. Tried it out in sandbox mode and it wasn't nearly that easy. Is there a reason why you can't get the full throughput?

Where do you get the water to run this stuff? I have a couple geysers around my map for water but its insanely hot and melted my water pump. Still new to the game, so wasn't sure the best way to cool the water down first. I was letting it cool down over time on its own, but then I got greedy for water and pumped out to much cool water at once and it filled up with the way to hot stuff faster. I mean I am only on day 76. Not sure when these bigger set ups start to become more important.

The big thing I do differently is I use an aquatuner to preheat the water going in up to 101c. The aquatuner then provides cooling to the gas or to my base, no steam turbine required. The aquatuner can be made out of any metal ore because it's not going above it's overheat temp. The big advantage is that you get a great cooling system early game, well before you have access to plastics or steel, and there's enough hydrogen produced to power the AT as well as the rest of the SPOM. The other big thing I do differently is set it up to run off the main grid so the hydrogen can easily be used to power rockets later. Technically, I guess that makes it not a SPOM, but semantics, whatever.

In my experience you can turn off the hydrogen pump with a really high setting on the sensor, until there's hydrogen at the top, rather than disconnecting it.

How *much* excess Hydrogen are generating per electrolyzer? I’m sure it would vary a bit based on the number of pumps and energy draw, of course, but I’m just curious about a ballpark figure. Like, if you built one around a entropy destroyer machine, would it be enough to keep it going, for example?

28:55 Actually, why not make them radiant pipes? The output will _at least_ be 70°C. This is extra heat production, on top of what is stated. If you feed it 0°C water, that will be 70°C added. if you feed it 70°C water, that will be 0°C added. The closer you get them to the output temperature/output DTU total, the less overall heat it will produce. I mean it could still well be that just the generators and machinery add so much heat it will pass 100°C. But just cooling the oxygen earlier should be a powerful thing to keep it cooler.

Any reason for not using a gas element sensor and shutoff value instead? Would be a lot more energy efficient than the gas filter

The number of Electrolyzers in the Rodriguez shown should make enough O2 for 7 pumps. It seems as if a slight modification could improve it. Though of course I understand the appeal of having an even number of pumps. Also. A good SPOM makes more than enough power to have gas filters on all outputs both O2 and H2. Especially if you have the H2 generators chipped with Engie's. Then also it's easy to get cooling right in the SPOM and heat up polluted water or brine from a slush geyser just enough to sieve it and make water at the right temperature for Sleat Wheat.

how do you make you oxygen overlay look clean? mine looks like everything is trying to merge together more. where as yours looks like nice solid blocks

34:19 The .88 doesn't seem that important, but there's two things to it. One is that when you start bringing back a lot of coffee mugs, you might be able to get deep diver's lungs on everyone, giving them a nice reduction in oxygen consumption. The other is that it's nice to have a bit of excess production, to make up for when things might go horribly wrong, like misjudging water production and sending too much to the oil biome, leaving not enough for the SPOM.

With automation I often find I am able to run my early bases off of the extra energy from my spoms. I prefer a single hydrogen pump and just 2 oxygen pump design. It uses far less energy, and it gets me off algae and hamster wheels. I keep the hamster wheels around until I just in case I overtax the limited design.

I started playing this afternoon and now I think I can do a gas installation in my house jajajaja

How do you get so much water to be supplying the setup in the thumbnail (at 36:00)? The problem I am having is I am running out of water. Is there a particular advice you have to get water or keep water in check? I even have Cool Slush Geyser, Polluted Water Vent, and a Cool Salt Slush Geyser in close proximity and they are not able to keep up with the demand of 6 Electrolyzers due to the varying dormancy stages.

The one thing missing in this video is water, I mean you do say we must engrave the 1kg consumption on a full electrolyzer, but do the run at 100% in those models? I see brief pauses, does that mean they are consuming less? also, how many cool steam vents do I need or what average water production do I need for each of those spoms? It really seams a full rodrigues need more than a single CSV, am I right?

Insulating the water pipes is a mistake so long has your water is coming in cooler than around 55 degrees. If feeding 30 degrees Celsius water, I usually use a small loop of radiant pipes to allow the water coming in to cool off the oxygen going out before it leaves the system. This actually saves cooling by reducing the total heat the electroliser generates, since they have a minimum output temperature.

The prospect of consuming 100g of any gas per second is crazy. At atmospheric pressure and room temp that is like a home of oxygen, per second.

It helps to have it explained step by step. I was straight up confused as to why the oxygen production was not half the hydrogen. Guess chemistry doesn't match our world.

30:37 If you don't have mods installed, the workaround is to simply not finish connecting it up in the blueprint mode. It'll take a slight bit of damage from a single packet of oxygen, but it's much better than fixing it as it breaks.

Ah yes the before times of ONI, when certain liquids had funny properties, buildings did odd things when pushing the thermal limits. Liquid hydrogen required some really really odd mechanics to get, and it was possible to get solid hydrogen and brick a carefully constructed system, wheezeworts did some very peculiar things that could be abused.

SPOM: Thermium gas pump in a hot polluted oxygen vent going through a steam chamber under a steam turbine, into an auto-swept setup of ceramic deodorizers, powered by the heat of the vent. Don't @ me.

I built the second SPOM you had, with the three pumps and two hydrogen generators, however all of my wires keep getting overloaded and damaged. I can't find in your video where you say how to fix that. Can anyone help?